Computer Resets at Startup

[endemoniada]

Hello,

Occasionaly my computer seems to reset a few seconds after it's powered on. It's a quality rig I built a year ago and I am getting worried. I have no idea what this could mean.

Thanks.

 

[HEXiT]

specs plz...

 

[carlos_101]

May your system isn't booting from the hard drive , try checking the cables of hdd and make the settings as default from the setup that come before starting the of windows.