My P.C keeps switching itself on and off......

[eddy1953]

When I switch my P.C on it works for 2 minutes then it stops for 10 seconds then it starts again all by itself. It keeps doing this all day.
Here is details about the computer;
Case : Termaltake, Tower
Motherboard : Gigabyte
CPU; Intel
CPU heat sink ; Noctua
Op.System; Windows 7
The computer was custom built in 2009. It was working fine til 2012.
It has not been used since 2012.

 

[Calin]

My guess would be the PSU. What are the exact specs?
Just open it and take a picture so that we can find out what PSU it is.

 

[johnb35]

So where has it been stored the last 4 years? Also could be dead cmos battery.

 

[_Glitch]

It's properly dusty inside from being stored away for 4 years. Dust in heat sinks takes away cooling performance. Give it a clean.