G550 + NT4 problem

[stickedy]

I have the following problem:
Asrock K7VM2-Board with VIA KM266 chipset, the OS is Windows NT4 with SP6a. The G550 is used for DualHead.

The PC with the onBoard graphic works flawless. If I insert the G550 and disable the onBoard graphic in the BIOS, I immediately see the picture throug the G550. Very good so far!

The problem is the windows-driver: If I install the driver and then reboot, I get an error meassage that the driver couldn't be loaded and therefore standard-VGA is used. I've tried the latest and the last WHQL driver, no difference.

Has anyone an idea? Thanks!

[UtwigMU]

Did you successfully uninstall drivers for onboard graphics?

Reboot in VGA mode and remove all device drivers from devices and also use Matrox uninstaller.

Also delete any device drivers files left.

Then reinstall Matrox drivers. I was using G400, which uses same drivers very successfully under NT 4.0 untill recently.

NT rulez.