Computer keeps restating wont come on

Question

my computer keeps restating whats wrong it wont come on all the way

Answer 1

umm, virus?

it crashed- try installing windows again =/.

Answer 2

Computers can restart for a number of reasons. To better understand your question, more information would be helpful. Is this a desktop or a laptop?

Reasons a desktop computer would keep restarting can be anything from, overclocking to high, bad ram, incompatible graphics card,  to over heating,  What changes were done to this computer before it started overheating?