Well :D thanks for your answers :)
I've managed to reinstall a missing booting file from Vista's CD :D now it works, but my antivirus was fucked up, and I've noticed that viruses came from a game I downloaded
Powned?
xD Mart, no fucking a pc won't help, especially with all it's fans in it... Ouch! xD
I'll try to do this CCleaner/hijackthis one day :) as I've missed a lot of time xD
everything works! :D
But anyway, as I'm going to have exams starting this monday, well, I might be inactive aswell xD