(Solved) I Getting System Shutdown error after 20 mins HELP

Hi,
when i start windows xp after 20mins an error comes System Shutdown says your computer will shutdwon in 60 secends and after that it shutdowns now please help me now i cant work, play games, cant do downloading PLEASE HELP
Answer #1
your pc is probably infected by a virus.run in safe mode and scan for antivirus(try to update ur virus definition in 20 minutes ). good luck
Answer #2
ok i know a way to stop the computer from counting down and it should stay logged on and not restart go to run and type in “shutdown -a” (without quotes) and it should make the timer dissapear do this when the timer comes up and starts to countdown you only have 60 seconds like you said so do it quick
this may stop your sound card from working so you won’t have any sound and some programs may not run but it should be ok to run virus scans and search for the problem
Answer #3
i have updated my bitdefender 2009 with latest updates and started an Deep system scan maythis help thanks for your comments
Answer #4
it’s a virus, just check your whole computer, you might need to do it while in safe mode too.
Answer #5
thanks to you all guys. i think i got this problem by this way i installed Norton internet security 2009 then updated it then run an full system scan he got you some virus then today i got that problem then uninstalled the Norton internet security 2009 and installed Bitdefender 2009 and run Deep System scan ho got the all virus etc and my pc is still running. Bitdefender 2009 is better then Norton