Alex,
After you install a new Display card the generic MS drivers should
automatically be used by the XP OS because there are no drivers usually
installed when building a new system, for example..
So, in your case, you are able to use the new card in Windows, right..?
The monitor is connected to the new card, not to any onboard Display
controller, right..?
On my system, had go to "add remove programs" three times to uninstall my
ATI drivers before Windows indicated that the MS generic drivers were being
installed for the new device.. You may need to keep looking in add remove
programs as soon as you boot-up into Windows to verify no Nevada drivers or
control panel are being installed, from a rollback location.. You will need
to reboot each time too, for the changes to take affect.. Look on the driver
tab, "any" listed card(s) properties, details button, to see if the signed MS
drivers have any company, ie. Nvidia drivers..
Or you could try the Windows Installer Cleanup utility, see link, to remove
any Nvidia installed apps, etc, that may show up, your call..
http://support.microsoft.com/default.aspx?scid=kb;en-us;290301
Use the above tool wisely, it can remove other apps too, so be careful..
Sounds like you may have done a Repair Install of XP, which would account
for Windows holding on to the old cards Info in the registry..
Post your results..
Cheers
j;-j