[Stratos]

Thanks! I´ll try to check with another power cable. I had another comp. before this one and IIRC it behaved the same occasionly. But I´m not 100% sure of that since it was some time ago I had it. My dad has it now and he claims it works just fine. The problem with the warranty is that, as far as I know, only applies to each individual component and not the comp. as a whole (yes I know it was a bad deal.) And the company I bought it from, an internet company, have some really complex rules as to return it. You have to pay for the shipping yourself and they pay for the reurn to you once they fix the problem. That is IF they find a problem.
If it´s just the power cable or power supply box then it´s cheaper to buy a new than to return it to the store. I´m gonna let someone check the wall sockets though, they might be old and one of them is actually a bit loose.
The comp. have behaved like this a few times before but not as often as recent weeks and definitly not three days in a row.