My computer restarts when I am working on this where is the problem? Please help

[kantiprasad]

Hello,my computer restarts when I am working on this where is the problem? Please help me

 

[ktownmike]

How old is your computer, and what type is it? It is guess 1 the processor is overheating and you need to blow out the dust. Try stating in safe mode, tapping f8 key during boot and see if you have any problems.