It's most likely a virus. What do you mean by "did not turn on again" . Does the fan still turn? Do you see a biosscreen? Or maybe perhaps even a Windowsscreen?
If you can still see windows trying to start, hit F8 and select ' safemode'. Scan your hd for virusses with AVG (free)
Regards Niek
Nick Evan
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10,112 posts since Oct 2006
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How did you check for virussen if you computer won't start?
Are there two versions, one for spyware and one for viruses?
Yes. Use AVG for visusses and adaware for spyware.
If your computer doesn't boot at all, it's probably your PSU (power supply unit). Try replacing that.
Regards Niek
Nick Evan
Not a Llama
10,112 posts since Oct 2006
Reputation Points: 4,142
Solved Threads: 403