|When it did boot would it come up for a little while and after using it for about 5 minutes, shut down? |
Did it just boot to the Windows Splash screen then reboot?
If the first, then you have a CPU fan problem and you computer is overheating.
If the second then you have a drive failure problem. It should be booting to an error message like No Boot Record found or something like that. If this is the case can you post the error?
We need more to go on.