Well it seems heat may be an issue if you have an INtel cpu. As it is under no load and is running @51c. Can you open the case and see if any duist is in the cpu heatsink and fan? Or even let the side of the Case be open for abit to see if it comes down. I would hate to see your cpu under full load. It probly jumps to around 60c or higher.

What kind of processor are you running Stephen?
AMD (Athlon, Sempron etc.) or Intel (Pentium, Celeron etc.)?

Ok i will open it....however i cannot today :-(, cause i'm in a hurry...however, by tomorow i will do what you told me, and i will give you a reply.

Thank you very much for your help.

I'm runing PENTIUM 4

Oke, in that case your CPU is overheating for sure.
We'll get back on this tomorrow, when you're back.

Hello,

I've tried what you told me to do...and i took a screenshot of the temperature readings (attachment).

However, after only 5 minutes that i opened the computer, it rebooted again. And when i restarted it again, after 2 min it did the same thing :-(

temp.JPG

Thank you.