Database Users

[Q] Extreme Driver Fail

Hello Everyone,
----------------------------
Nexus 7 Driver Fail
----------------------------
I was Unable to install drivers on Windows XP (ADB and Fastboot Drivers do not load). Every step has failed and multiple drivers fail to install with Code 18 and 28. I’ve tried just about EVERY Tool Kit available out there and searched fourms, still no positive results. If anyone out there may have an answer please feel free to drop it in here, I greatly appreciate all your help. Thank you.
Here is a list of what I have done thus far:
- Rebooted the computer after uninstalling devices with USB Deview before
continuing on to the other steps
- Uninstalling and manually deleting driver from the registry
- Unplugging and repluging the device while watching
the device manager (The device shows up as other devices, Example: nexus and MTP)
- I tried disabling auto driver configuration by Simply pressing the "Disable Auto Driver Config" button and then
changing the settings accordingly
- Registry cleaning
- Removing and manually adding to windows driver folder
- Trying on different User accounts from Admin to guest
- Used Android SDK manual driver installation
- Unplugged the device and Launched USBDevice
- Used USBDeview to uninstall any;
- Android ADB Interface device's
- Samsung USB devices
- Google USB drivers
- ANYTHING else you see that resembles your Nexus.
- Looked for devices with Vendor ID's:"18d1"or"04e8"
I then right clicked these devices, and selected the option to” Uninstall Selected Devices"
-Downloaded The official Asus USB driver off of Asus actual support base
And it said the following: an error occurred during the installation of this device The Parameter is incorrect.

Have I missed this action:
Download the drivers from Asus and unpack them to their own directory.
Connect the N7 with USB debugging enabled in "developer options"
Open Device Manager
Locate the N7
(from here my xp knowledge is rusty)
Right click on the N7 and select properties
Find the option to install/update drivers, Take the option to specify the driver directory where you unpacked the download, ensure that include sub directories is ticked and that should install

peterk-1 said:
Have I missed this action:
Download the drivers from Asus and unpack them to their own directory.
Connect the N7 with USB debugging enabled in "developer options"
Open Device Manager
Locate the N7
(from here my xp knowledge is rusty)
Right click on the N7 and select properties
Find the option to install/update drivers, Take the option to specify the driver directory where you unpacked the download, ensure that include sub directories is ticked and that should install
Click to expand...
Click to collapse
I tried the same steps.
I even tried using Android SDK, Universal Naked driver
Still no luck
N7 running 4.2.1 stock

[Q] Nexus 7 USB connectivity to Windows XP SP3

Guys, I know i am repeating again the question but despite reading 15-20 posts and uncountable articles, I am still not able to get my nexus 7 working with the Windows XP SP3.
1) To start with, I downloaded the google drivers from ASUS and the MTP Porting Kit from microsoft.When i plug in the device with USB Debugging on, Windows shows 3 new devices- NEXUS 7 & Android ADB Interface.. and ofcourse Windows XP can not find the drivers for any. So i open the device manager and it shows Nexus 7 under unidentified devices. I install the drivers for ADB interface (the ones i downloaded from Asus) and the device becomes ready to use. But there is no option to browse the device from my computer or portable devices. Then i switch the debugging on, and now there is a new device- MTP under unidentified devices. Then i install the MTP Porting Kit, but the MTP device still shows a problem with the driver.
2) The second part of the problem is that all this did not work and even my WMP11 does not recognise the Nexus 7.
The device is just connected and charging!!! What am i doing wrong here???

try this...
http://forum.xda-developers.com/showthread.php?p=34608868
Sent from my Nexus 7 using xda app-developers app

o82239 said:
try this...
http://forum.xda-developers.com/showthread.php?p=34608868
Sent from my Nexus 7 using xda app-developers app
Click to expand...
Click to collapse
It worked, but the MTP keeps popping up for installation again and again.. and I am STILL NOT ABLE TO SEE MY DEVICE

ansh360 said:
Guys, I know i am repeating again the question but despite reading 15-20 posts and uncountable articles, I am still not able to get my nexus 7 working with the Windows XP SP3.
1) To start with, I downloaded the google drivers from ASUS and the MTP Porting Kit from microsoft.When i plug in the device with USB Debugging on, Windows shows 3 new devices- NEXUS 7 & Android ADB Interface.. and ofcourse Windows XP can not find the drivers for any. So i open the device manager and it shows Nexus 7 under unidentified devices. I install the drivers for ADB interface (the ones i downloaded from Asus) and the device becomes ready to use. But there is no option to browse the device from my computer or portable devices. Then i switch the debugging on, and now there is a new device- MTP under unidentified devices. Then i install the MTP Porting Kit, but the MTP device still shows a problem with the driver.
2) The second part of the problem is that all this did not work and even my WMP11 does not recognise the Nexus 7.
The device is just connected and charging!!! What am i doing wrong here???
Click to expand...
Click to collapse
I have exactly the same problem with my windows xp laptop it was OK until I wiped my laptop and reinstalled xp SP1-3 I can't seem to solve it either.
Sent from my Nexus 7 using xda app-developers app

:-/
Is there any justice for me in this bad bad world of octa-core processors and Razer Edge!!! :'(

ansh360 said:
It worked, but the MTP keeps popping up for installation again and again.. and I am STILL NOT ABLE TO SEE MY DEVICE
Click to expand...
Click to collapse
??? It worked and it doesn't work ???
What worked?
Try to delete the precompiled inf-file 'C:\WINDOWS\inf\wpdmtp.pnf', edit the 'C:\WINDOWS\inf\wpdmtp.inf' (see link in the post in the top...), open the XP device-manager, right-click in the yellow '!' and 'update driver'...
twics said:
I have exactly the same problem with my windows xp laptop it was OK until I wiped my laptop and reinstalled xp SP1-3 I can't seem to solve it either.
Click to expand...
Click to collapse
Do you have edit the 'C:\WINDOWS\inf\wpdmtp.inf'?
Sent from my Nexus 7 using xda app-developers app

I had a lot of problems myself getting Windows XP to work with my Nexus 7 as well... eventually I discovered that installing the latest version of Windows Media Player fixed the problem.
I wrote up a post on this issue on another forum (Sorry, XDA - this was before I discovered you guys), back in December of last year.
Anyway, here is my original post...
http://www.nexus7nexus10.com/forum/nexus-7-help/2600-cannot-connect-pc-2.html#post36608
(Actually, this whole thread is worth reading.)
The only nuisance factor is having to remember to re-enable USB debugging (Titanium Backup needs USB debugging enabled, and complains if itsn't) AFTER I've run some MTP Windows XP related file backups (USB debugging needs to be disabled, or MTP won't work)...
....or at least that is my experience.
Hope this is of some use.
Rgrds,
Ged.

Hello guys,
I have the same issue on windows XP with Nexus 7. I tried everything what was suggested and nothing is working.
I have Windows XP SP3 with WMP11 and MTP porting kit installed as well. the device is recognized and driver is instaled fine. But it's not visible on "my computer" in MTP mode. I tried to turn on usb debugging and still device is invisible in windows explorer, the same is when usb debugging is turoned off.
When device is in PTP mode it appears in "my computer" and i'm able to browse it and see all pictures and photos.
How can i browse my device in MTP mode and copy files there? Please reply if anybody knows what to do to fix this issue.
Thank you.

ansh360 said:
Guys, I know i am repeating again the question but despite reading 15-20 posts and uncountable articles, I am still not able to get my nexus 7 working with the Windows XP SP3.
1) To start with, I downloaded the google drivers from ASUS and the MTP Porting Kit from microsoft.When i plug in the device with USB Debugging on, Windows shows 3 new devices- NEXUS 7 & Android ADB Interface.. and ofcourse Windows XP can not find the drivers for any. So i open the device manager and it shows Nexus 7 under unidentified devices. I install the drivers for ADB interface (the ones i downloaded from Asus) and the device becomes ready to use. But there is no option to browse the device from my computer or portable devices. Then i switch the debugging on, and now there is a new device- MTP under unidentified devices. Then i install the MTP Porting Kit, but the MTP device still shows a problem with the driver.
2) The second part of the problem is that all this did not work and even my WMP11 does not recognise the Nexus 7.
The device is just connected and charging!!! What am i doing wrong here???
Click to expand...
Click to collapse
Recently got a 2012 Nexus 7 from a retailer selling this model with updated Android at very attractive price, and initially able to connect to computer so promptly rooted the device with the Nexus Root Toolkit from Wugfresh Development (in this forum), afterwards had same problems with not being able to read / transfer files.
Tried every fix I could find in other threads, and although device manager saying that connected as 'ADB Device' with debugging on, or 'Google Nexus 7 ADB Device' with MTP on and debugging off, still stuck with no access.
Looking closer at the MTP configuration ('Google Nexus 7 ADB Device') under device manager noticed that details listed manufacturer as 'ClockWorkMod' , and eventually that this originated within a Windows\Inf file titled 'oem60'.
I cut and pasted the 'oem60' file to another directory (to keep it safe just in case this upset something else) then on reconnecting the Nexus 7 as MPT with debugging off, device manager found and installed the correct driver at last. Now able to see and transfer files to / from it.
Presumably could alter the relevant lines in the 'oem60' file, which aren't hard to find, and put it back to original directory, but my other devices also working fine so not done so as yet.

Taowtp said:
Recently got a 2012 Nexus 7 from a retailer selling this model with updated Android at very attractive price, and initially able to connect to computer so promptly rooted the device with the Nexus Root Toolkit from Wugfresh Development (in this forum), afterwards had same problems with not being able to read / transfer files.
Tried every fix I could find in other threads, and although device manager saying that connected as 'ADB Device' with debugging on, or 'Google Nexus 7 ADB Device' with MTP on and debugging off, still stuck with no access.
Looking closer at the MTP configuration ('Google Nexus 7 ADB Device') under device manager noticed that details listed manufacturer as 'ClockWorkMod' , and eventually that this originated within a Windows\Inf file titled 'oem60'.
I cut and pasted the 'oem60' file to another directory (to keep it safe just in case this upset something else) then on reconnecting the Nexus 7 as MPT with debugging off, device manager found and installed the correct driver at last. Now able to see and transfer files to / from it.
Presumably could alter the relevant lines in the 'oem60' file, which aren't hard to find, and put it back to original directory, but my other devices also working fine so not done so as yet.
Click to expand...
Click to collapse
The above workaround was spot on, thanks

Nexus 4 cannot be recognized as MTP after root

I'm running Windows 7 64bit and followed the Ultimate guide to unlock and root my Nexus 4.
Everything went well but now it looks like that Windows won't recognize my phone as a device. When I plug in the phone, the auto-play window will pop out and recognize it as Nexus 4, but there is no other options. (Normally the auto-play will ask if open folder to view files or transfer photos). I can't see my phone in device manager either.
If I turn on the USB debugging mode, I can see it in device manager but still cannot see it in My Computer. Looks like Windows can't access the SD card at all.
I tried switching to the camera mode but the problem remained. Please help.

desperate bump. can anyone help?

Maybe it's a stupid advice, but have you tried change the USB port in PC?

glancer2315 said:
desperate bump. can anyone help?
Click to expand...
Click to collapse
Plug in the phone, uninstall the drivers from Device manager, then unplug, and replug.

Colourkey said:
Maybe it's a stupid advice, but have you tried change the USB port in PC?
Click to expand...
Click to collapse
yes, i did.

abaaaabbbb63 said:
Plug in the phone, uninstall the drivers from Device manager, then unplug, and replug.
Click to expand...
Click to collapse
thanks for your advice. the problem is that, without USB debugging mode on, I can't see Nexus 4 in Device manager, even though the Windows Auto-play will say Nexus 4 connected. (Nothing in My Computer either)
With USB debugging mode on, I uninstalled the driver and Windows would try installing the driver. Now it shows up as MTP device with an exclamation mark. I tried manually update the driver (direct it to the Google SDK folder and pick the android_windowsusb.inf) but it says it does not support x64. I don't think the 64 bit driver is digitally signed.

I think I had a similar problem as yours. If you deleted the drivers while on debugging mode and reconnected after and it's showing the exclamation mark of a unknown device, try restarting your computer and plugging your phone back in.

SovereigN7 said:
I think I had a similar problem as yours. If you deleted the drivers while on debugging mode and reconnected after and it's showing the exclamation mark of a unknown device, try restarting your computer and plugging your phone back in.
Click to expand...
Click to collapse
i did and it remains the same.
Is there anyway I can know all the files names of the drivers so that I can manually delete them from system folder? When I uninstalled it from the device manager, I don't see the option "Delete the driver software for this device".
I can still see it under "adb devices" list.

I think there are some conflicts in the drivers.
Now when I connect Nexus 4 (without USB debugging mode on), it will show up in device manager under Android Device.
With USB debugging, it will then show up under Portable Devices.
However, it's supposed to work the other way around. that is (no USB debugging --> portable device; with USB debugging --> Android Device).
How can i solve this?

Have you tried manually installing the drivers before plugging in the phone, vs letting windows choose the drivers it wants to install? One option you could try is installing PDA Net on your pc. It will install reliable drivers on your pc.

i also had this same problem after flashing my first custom rom on the n4, and i also run windows 7 Ultimate x64
here is the process i use for full clean installation of device
on phone
goto SETTINGS > STORAGE > (menu) USB Computer Connection
make sure Media Device (MTP) is checked
With USB Debugging On
On your PC go to device manager
there should be 2 devices (Android Phone > Android Composite ADB Interface & Portable Devices > Nexus 4) - this is on a fully working n4 so you might only have 1 of them
Right click on each of them and click uninstall
The popup box should have another check box to delete the driver also, if this is available check it then confirm (note mine only has the box for Android Phone > Android Composite ADB Interface, but if yours has it on both then check it on both)
your computer will now ask you to restart, dont do it yet
repeat previous step for the other device if you have 2 then reboot
upon rebooting it will automatically start reinstalling drivers
by expanding the selection you should see 2 devices
Nexus 4 - Successful - Ready To Use (this is your MTP connection)
Nexus 4 - Unsuccessful - No Driver Found (this is your ADB Connection)
at this point you should be able to access internal storage however ADB will not work
go back into device manager
you should now have
Portable Devices > Nexus 4
and Other Devices > Nexus 4 (with yellow exclamation mark)
right click on the Other Devices > Nexus 4 (with yellow exclamation mark)
hit Update Driver Software
click Browse my computer for driver software
click Let Me Pick Drom a List of Device Drivers On My Computer
double click Show All Devices
click Have Disk...
click Browse
navigate to the download directory for the google usb drivers (for me this was "C:\Program Files (x86)\Android\Android-SDK\Extras\Google\Usb_Driver")
double click on the android_winusb.inf file
click OK
double click "Android Composite ADB Interface"
it will then install the driver for ADB
you should now have full access to internal storage and ADB

Alex240188 said:
i also had this same problem after flashing my first custom rom on the n4, and i also run windows 7 Ultimate x64
here is the process i use for full clean installation of device
on phone
goto SETTINGS > STORAGE > (menu) USB Computer Connection
make sure Media Device (MTP) is checked
With USB Debugging On
On your PC go to device manager
there should be 2 devices (Android Phone > Android Composite ADB Interface & Portable Devices > Nexus 4) - this is on a fully working n4 so you might only have 1 of them
Right click on each of them and click uninstall
The popup box should have another check box to delete the driver also, if this is available check it then confirm (note mine only has the box for Android Phone > Android Composite ADB Interface, but if yours has it on both then check it on both)
your computer will now ask you to restart, dont do it yet
repeat previous step for the other device if you have 2 then reboot
upon rebooting it will automatically start reinstalling drivers
by expanding the selection you should see 2 devices
Nexus 4 - Successful - Ready To Use (this is your MTP connection)
Nexus 4 - Unsuccessful - No Driver Found (this is your ADB Connection)
at this point you should be able to access internal storage however ADB will not work
go back into device manager
you should now have
Portable Devices > Nexus 4
and Other Devices > Nexus 4 (with yellow exclamation mark)
right click on the Other Devices > Nexus 4 (with yellow exclamation mark)
hit Update Driver Software
click Browse my computer for driver software
click Let Me Pick Drom a List of Device Drivers On My Computer
double click Show All Devices
click Have Disk...
click Browse
navigate to the download directory for the google usb drivers (for me this was "C:\Program Files (x86)\Android\Android-SDK\Extras\Google\Usb_Driver")
double click on the android_winusb.inf file
click OK
double click "Android Composite ADB Interface"
it will then install the driver for ADB
you should now have full access to internal storage and ADB
Click to expand...
Click to collapse
thank you for your long and detailed reply.
this is what i wanted to do, but the problem is that when I uninstall them, I don't get to see the option "delete the driver software for this device". What should I? cuz every time I plug in Windosws just tries to automatically install the driver for me.

Have you tried toggling to ptp mode then back to mtp on your phone. It's odd indeed.
The fact that you can't remove the driver is because that is the mtp one which is built in to media player. Let me give this some more thought
EDIT: You said that with USB debugging disabled your device is listed under device manager as an android device
can you check and verify exactly what it is listed as? as it should be portable device
Sent from my Nexus 4 using xda app-developers app

Alex240188 said:
Have you tried toggling to ptp mode then back to mtp on your phone. It's odd indeed.
The fact that you can't remove the driver is because that is the mtp one which is built in to media player. Let me give this some more thought
EDIT: You said that with USB debugging disabled your device is listed under device manager as an android device
can you check and verify exactly what it is listed as? as it should be portable device
Sent from my Nexus 4 using xda app-developers app
Click to expand...
Click to collapse
hi under android device it shows up as Android adb device
under portable device i can it now showing up as MTP USB device with exclamation mark.

glancer2315 said:
hi under android device it shows up as Android adb device
under portable device i can it now showing up as MTP USB device with exclamation mark.
Click to expand...
Click to collapse
does adb work?
i.e. adb devices
or is USB debugging turned off at this point
Also. The one with the exclamation mark. Right click and go to properties. What does it say in device status

Alex240188 said:
does adb work?
i.e. adb devices
or is USB debugging turned off at this point
Also. The one with the exclamation mark. Right click and go to properties. What does it say in device status
Click to expand...
Click to collapse
hi, adb devices works. (will list my device when usb debugging is on)
with usb debugging off, under portable device, the device status says "This device cannot start. (Code 10)". thanks.

still looking for solutions. maybe i should try uninstalling the ADB driver, but the problem is that when i uninstall the device from the device manager I don't see the option "delete the driver software for this device", any help?

glancer2315 said:
still looking for solutions. maybe i should try uninstalling the ADB driver, but the problem is that when i uninstall the device from the device manager I don't see the option "delete the driver software for this device", any help?
Click to expand...
Click to collapse
I have this same issue I'm trying to find a fix, that's how I found your thread. Alex gave very good info make sure you go back to his posts and hit his "Thanks" button, I did it on everyone one of his posts in this thread. I'm starting to think it's a hardware issue and not a software issue, I've never had this issue on any device. When I got it new running stock 4.2.2 MTP didn't work. ADB works and PTP works, just not MTP no matter what I try. I recommend you learn to use, ADB push and pull to move your files if you don't already know how to use it (To use ADB I need to check PTP for it to work and not MTP) you might need to do the same. I will keep you posted if I find a fix.
Sent from my Nexus 10 Pimpin AOKP 4Life

I'm just getting more and more confused with this.
If Adb works then you must have an Adb driver installed for the phone. However your also stating that you get no box for uninstall driver.
With USB debugging disabled you said that it appears as an android phone rather than a portable device. This should not be.
With debugging disabled what happens if you Try to uninstall in device manager
Sent from my Nexus 4 using xda app-developers app
---------- Post added at 01:54 PM ---------- Previous post was at 01:51 PM ----------
My theory still stands that you have updated the mtp driver with adb drivers. Hence why mtp doesn't work but ptp does.
The problem is getting to a position where you can uninstall the adb drivers from the mtp device and let it reinstall the proper drivers
Sent from my Nexus 4 using xda app-developers app

I plugged another Nexus 4 in, and all the drivers loaded perfectly. I then tried my Nexus 4 phone, and nothing happens. No mtp, no adb, no boot loader drivers. Its my phone. My next step is to find a zip file that I can flash via custom recovery, which will bring all the binaries and ROM back to stock. Anybody know where I can find this? I'll probably lose the custom recovery, but hopefully it will be fixed and I can flash the custom recovery again.
LG-E960

After using Nexus Root Toolkit cannot connect in regular USB mode

I have used Nexus Root Toolkit twice successfully on two different computer, but on both occasions that has left the computer unable to connect to the Nexus 10 outside debugging mode.
I think it is "Step 1" in the driver install guide that tells me to:
2.) Launch Device Manager using the button bellow.
- Identify whatever device resembles your Nexus and right click it
- Select 'Uninstall'
- Check the box for 'Delete the driver software for this device'
- Select 'OK'
3.) Unplug your device and Launch USBDeview using the button bellow
- Use USBDeview to uninstall any;
- Android ADB Interface device's,
- Samsung USB devices,
- Google USB drivers
- ... or ANYTHING else you see that resembles your Nexus.
- In particular look for devices with Vendor ID
- "18d1" or... "04e8"
- Simply right click these devices, and select the option to:
- "Uninstall Selected Devices"
Click to expand...
Click to collapse
After doing this i can no longer connect the Nexus 10 as usb drive or/MTP. If i connect it, it simply says charging, and the Windows device manager doesn't list any new devices at all. Its like it isn't connected at all. If i enable usb debugging, i can use Nexus Root Toolkit without problem.
The computer in question is running Windows 8.1, and i first installed the Universal drivers that didn't work, and then got it to work with RAW drivers.
I assume that something got uninstalled that shouldn't have been, but i don't know what. Any help is appreciated, i don't fancy reinstalling windows

[Nexus 7 - 2012] Windows 8.1 wont recognize my tablet

Hi everybody.
I have a problem with my Nexus7 tablet, windows 8 can't see it on Devices and drivers and after I plug off the usb cable this error message appears:
Image like: The last USB device you connected to this computer malfunctioned, and Window does not recognize it.
First thing I opened the developer options and checked USB Debugging, after that a strange icon with 4 vertical white rows appears on the notification tab, It was not the usually USB debugging icon.
Then I went on Device Manager and under Acer Devices (Why Acer ???) I found ACER Composite ADB Interface, so I've decided to install again the drivers following this guide:
-----------------
But at the point 8 I can't see "USB composite device" but only "Acer composite ADB interface".
Since yesterday the tablet worked, and I have not update the tablet neither the pc.
What should I do ?
Thanks for the help, sorry for my bad english
* I have few message so I can't upload images or link, sorry for the inconvenience.

I opened now "Devices and Printers" and I saw Nexus7 (with the correct label) under "unspecified", I cannot interact with it

mmm no one ?

I have the same issue with my 8.1 laptop. I think the Acer driver is something which Microsoft pushed in an update to 8.1 recently. I may go in and see if I can revert it. Not sure I am much help as my only workaround was to grab my Win 7 laptop, which worked as it should. I did not have the time or patience to screw with it.

Pickeroll said:
Hi everybody.
I have a problem with my Nexus7 tablet, windows 8 can't see it on Devices and drivers and after I plug off the usb cable this error message appears:
Image like: The last USB device you connected to this computer malfunctioned, and Window does not recognize it.
First thing I opened the developer options and checked USB Debugging, after that a strange icon with 4 vertical white rows appears on the notification tab, It was not the usually USB debugging icon.
Then I went on Device Manager and under Acer Devices (Why Acer ???) I found ACER Composite ADB Interface, so I've decided to install again the drivers following this guide:
-----------------
But at the point 8 I can't see "USB composite device" but only "Acer composite ADB interface".
Since yesterday the tablet worked, and I have not update the tablet neither the pc.
What should I do ?
Thanks for the help, sorry for my bad english
* I have few message so I can't upload images or link, sorry for the inconvenience.
Click to expand...
Click to collapse
You may wish to go to Storage, on the Nexus 2012, and under the 3 dots, USB computer connection menu, and tick/untick Media Device
Windows 7 and 8, appear to have USB storage driver conflicts, when many different devices have been used repeatedly.
Good Luck!
There are other posts, in the General section, that deal, with this annoying issue.

ROLY5573 said:
You may wish to go to Storage, on the Nexus 2012, and under the 3 dots, USB computer connection menu, and tick/untick Media Device
Windows 7 and 8, appear to have USB storage driver conflicts, when many different devices have been used repeatedly.
Good Luck!
There are other posts, in the General section, that deal, with this annoying issue.
Click to expand...
Click to collapse
Thanks for the hep but it didn't work.
Now the "old" icon came back with "connected as a media device" written with it but the tablet remain invisible.

Same problem here.
Fixed it by disconnecting teh device, going to device manager, showing hidden devices and uninstalling everything related to Nexus 7.
This includes Acer ADB, Android, Nexus7 and unknown devices.
After that I downloaded the Android SDK and installed the Google USB driver from it, connected my Nexus 7 and it werks.

pepo930 said:
Same problem here.
Fixed it by disconnecting teh device, going to device manager, showing hidden devices and uninstalling everything related to Nexus 7.
This includes Acer ADB, Android, Nexus7 and unknown devices.
After that I downloaded the Android SDK and installed the Google USB driver from it, connected my Nexus 7 and it werks.
Click to expand...
Click to collapse
Still nothing, I showed the hidden devices and unistalled all the voices under the "Acer" directory, I haven't found anything related to Android/Nexus 7.
Then i went to http://developer.android.com/sdk/win-usb.html and downloaded the USB driver, but the Nexus7 result again as an unspecified hardware.

Now it works ! I didn't touched it in the last 2 hours and now it works. :good::good: