Need Help: PC keeps on restarting

[makie]

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For almost a week already, one of our PCs here in our office keeps on rebooting. When it started, it reboots for about every 4 or 5 hours but now, it reboots for almost every 3 to 5 minutes.

I have ran a virus scan already, checked the connections, cleaned it, and reinserted the peripherals but still to no avail, it still keeps on rebooting.

What could possible cause the problem for this one? I badly need help. Thanks a lot in advance fellow Istoryans.

[alwaysdrunk]

try daw ni brad

1. try total system scan using any antivirus
2. try generate system health report
3. try defrag, disk cleanup etc.
4. kung windows 7 na naay capability na nga mo fix at start up try pud
5. ug wa gyud try paslak OS cd then repair computer
6. reformat.

[COMCAM]

+1 to alwaysdrunk, @ TS, if you have the necessary hardware checker na software as well, well and good

[werty]

individually check hardware, especially harddisk and memory and powersupply

[makie]

Thanks Istorya. It seems like I've found out the problem already. I disabled the restart mode then a blue screen appeared. There was a message about NV4_disp so I think that this is a videocard related problem. So far from the last reboot, it never restarted again. I just hope so.

+1 to alwaysdrunk, @ TS, if you have the necessary hardware checker na software as well, well and good

Do you know any links as to where I could find some good downloads about hardware checkers?