I do tech support for HP Pavilions, and I get actually get this problem alot. Here's usually what I do, and it seems to work almost all the time. First, boot into safe mode, by tapping the F8 button at your BIOS screen. When in safe mode, go into the Control Panel, and into the System properties icon. When in there, click on the Device Manager tab. When in safe mode, you can see EVERY driver that's loading for system, and more often than not, if you have an OEM system, there are extras loading that aren't even used, and sometimes causes problems. I usually just have the customer remove EVERYTHING from underneath cd-rom, display adapters, and sound, video, and game controllers until the categories themselves are completely gone. Then, before rebooting the system back into normal mode, click on Start, then Run, and type in the command msconfig. This will get you into the System Configuration Utility, in which you should see a Startup tab. Click on that, and clear out the unnecessary programs that are starting up on your computer. Then reboot, and Windows should reinstall only the drivers that are needed for the cd-rom, video card, and sound card. This will effectively rid you of the main troublemaker drivers that were loading. It should ask you to reboot again, for the video card, and boot back into Windows. Then see what happens. Hopefully this will help you, and if you have an OEM computer (meaing you bought it from the store prepackaged), it might actually work. Good luck.