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Windows 7: Can't delete default vga driver - can't install new one

24 Oct 2009   #11

Win XP / Win 7

Hmm... I don't think I can help.

I would have to experience that problem myself and play with it.

I would also try to search for that default Windows 7 nvidia '.sys' driver file in your c:\windows directory. Windows 7 might have some other depositories with drivers and edit them all. Worse case you can edit them back to normal.

My System SpecsSystem Spec
25 Oct 2009   #12

Windows XP Pro 32-bit

I think you're getting warm - a friend wrote and said he found a post about how to do a "fresh" install of ATI drivers on Win 7. It involved pulling stuff out of C:\Windows\INF.

He will give me full details tomorrow.
My System SpecsSystem Spec
26 Oct 2009   #13

Windows XP Pro 32-bit

Lexxion, why would you be trying to prevent the OS from installing your video card as a Standard VGA Adapter? Isn't that what we should expect? From which point, we can simply load our vendor's driver, correct?

My friend gave me this long procedure to get Win 7 to load the card as a Standard VGA Adapter. He then simply states, "go ahead and install your desired Nvidia driver".

Also wouldn't it be easier to make a copy of VGAPNP.SYS before changing its security? I tried restoring its security to what it was before and there's too many levels of detail there for me.

Here is my friend's procedure. Pretty nutty what you have to do to get Win 7 to load a Standard VGA Adapter:

#1. Go to Device Manager and Uninstall the (Physx, Stereoscopic, if you have those) and Nvidia driver.
#2. Do not restart.
#3. Run newest version of Driver Sweeper Downloaded from 3dguru, click analyze, click clean, click, analyze again, click clean.
#4. Reboot.
#5. You should see a command prompt window from Driver Sweeper asking you Y/N on a line that says C:\Nvidia*, type Y, enter (but actually doesn't matter whether you type Y/N because it doesn't clear that folder anyway, still a bug I think from Driver Sweeper).
#6. At this point, your desktop resolution should be at like 640x480. Go to Device Manager and you will see your card but it will have a little yellow triangle and it will show the default WDM driver there.
#7. Run Driver Sweeper again as described above, but do NOT reboot.
#8. Go to C:\Windows\inf, make a new folder called Nv and move nv_lh and nv_lhPNF to that folder. After that clear the Prefetch folder leaving the one folder inside Prefetch, but just delete all the files, located in C:\Windows\Prefetch.
#9. Go to Device Manager and uninstall your card by right clicking, properties, driver tab, uninstall. (you wont have the checkbox to delete, don't worry bout it).
#10. Right click My Computer>>Properties>>Advanced System Settings>>Hardware Tab>>Device Installation Settings. Tick radio button that says No, let me choose what to do. Tick radio button that says Never install a driver from Windows Update.
#11. Restart and you should see the same command prompt window from Driver Sweeper asking you Y/N on a line that says C:\Nvidia*, type Y, enter.
#12. Then at desktop you should see an error popup that says device was NOT installed, if you click the error you will see it searching for preconfigured drivers to install, but it will find none. Close that and go to Device Manager, you should see Standard VGA Adapter.
#13. Install the newest version of Nv driver.
My System SpecsSystem Spec

26 Oct 2009   #14

Win XP / Win 7

What happens with Intel's 855GM Video driver is whenever you try to install the CORRECT driver on the restart it reverts back to Standard VGA Adapter.

In order for Windows 7 to keep Intel's driver people have to follow that procedure.

It does not matter if you just rename the file and then try the procedure. If that file does not exist Windows 7 will copy it over from repository. So by just modifying that file, you will be able to point to the correct driver and that driver will be remembered from that point on.
My System SpecsSystem Spec

 Can't delete default vga driver - can't install new one

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