|Boot to safe mode via the F8 menu.|
Open Display in Control Panel. Click the Settings tab. Click Apply. Click Yes in the box that opens warning you of the change. Then click Yes again in the reboot box that opens.
Reboot to normal mode. You'll have 640 x 480 resolution with 16 colors. You can then change that to something higher that's compatible with your monitor.
Real men don't use AntiVirus; they just reformat