When i switch on pc evermorning after few min work pc restarting?

Question

When every morning i switch on my computer ( xp professional ) after few min work my pc reboot and start scanning hards , i changed motehrboard / power and also re-installed windows but still i have same problem
security system i have in my pc are :

- tune-up
- avg free edition
- ad-aware

any idea whats wrong with my pc

for your information once once re-starting a day and after that my pc work normally

thanks

Answer 1

Thats a hard one to trouble shoot over the internet, but if I had to guess, you have some bad sectors on the hard drive......

Update: Bad ram will cause random reboots, not just once, but constantly.....I have had this happen before....

Answer 2

There could be some funny causes of such a problem.
One: It possibly could be a daily update setting on your PC. In this case, ya pc has got to restart itself immediately an update session is completed for the installed patches to take effect.
Again, this could be a virus attack which is design to attack ya boot sector immediately the system is booted and once after that it hides and waits for another restart.

Answer 3

Are you using an On-board video card? Perhaps you should set your Screen Resolution to a lower resolution. I suppose you know how to do that.
You can also try to update your video card driver.

Answer 4

Change your Ram
i had the same problem
when i changed my Ram it was fixed.

Answer 5

Infected virus!!