That's a BIOS or hardware issue.
If you can't enter the BIOS setup to set it to defaults, find a repair shop. A new motherboard could be the solution.
Kees
After pressing power button, my desktop computer is restarting after the very first screen that appears intel's logo "Intel desktop board inside".
Usually i see this screen only around 2-3 seconds. But now it appears around 20-25 seconds. After that it restarts automatically.
Can anyone please help me on this?<div>
My desktop computer configuration:
64bit, i5 4th Gen processor, 8GB RAM, 1TB HDD
</div>

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic