Recently when my computer is left on it seems to lock me out of everything. I am unable to open any NEW PROGRAMS but the previously opened programs (foobar, FIREFOX, game i'm playing) work pretty much the same.
I can open task manager but whenever I attempt to end a process or program it FREEZES then after a minute or two it gives me some sort of error. (Unable to end process access denied something like that)
It only happens after the computer being on for 5-6 hours so a quick reboot fixes it but I'd like to KNOW what exactly is going on.

I thought maybe a virus but it doesn't really sound like one to me but I really haven't had many virus issues in the past.On second thought it might be a better idea to move this to the XP section since I'm pretty sure it isn't a virus.Well decided to attempt to use my xp disk and try a os repair. Gave me a c000021a blue screen error when loading windows. So I just formatted the drive and reinstalled xp.
Problem has gone away not sure what it was but it's fixed.