It sounds like you have some problems either in the registry or some corrupted system files. Are you running XP? If so, is there any chance you have an older restore point? Depending on what programs you have installed and what settings you have tweaked, a repair from the CD may help, but like I said, more info is needed as far as alterations/tweaks, installed programs, and if you have any programs installed along with device drivers (like NView for NVidia cards). At this point, though, it's hard to tell what these symptoms are pointing to. Have you checked the MSKB for any issues with opening display settings or with installing Kapersky?