My PC keeps restarting

[Matt]

HELP! My Pc keeps restarting its self when i log into my
area.... ive scanned for viruses and found nuthing. ive
temp fixed this by going to standby then logging in and i
can get it to work... does any one know whats wrong?

 

[cimex]

SHUTDOWN ISSUES:

Windows XP Shut Down Issues
http://www.kellys-korner-xp.com/win_xp_restart.htm

Troubleshooters for Windows XP Shut Down
http://aumha.org/win5/a/shtdwnxp.htm

Troubleshooting Windows XP Shutdown Issues
http://www.theeldergeek.com/shutdown_issues_in_xp.htm

 

[Jeremy]

What are your system specs? Could be a bad psu if you are getting repeated
restarts.