Can't open Control Panel, My Computer, Recycle bin, nor can I boot in Safe Mode
Gotta keep the kids off the computer. Have run several virus scans and spyware, anything found has been removed, but still can't open My Computer etc., from desktop, nor control panel through Start. When I boot and press F8, nothing happens, just boots normally. When I boot with the Windows XP disc in the drive, the start up asks if I want to boot from the disc, press any key, which I do then it boots up normally! Everything else seems good, the kids can hear music, use Office functions, the printer works, IE and FireFox seem fine.
Not sure where to start as I am a bit of a novice at all this.
Suggestions gratefully accepted.