@RotatorSplint: To begin with it freezed, needing me to manually restart but now it can also restart itself.
@Ant: Yes I've tried everything with no luck
But I think I know why it happens. The old story of the PCs resources being stretched and overheating. Never used to do it before though so there might even be a corrupt driver (video) so I've decided to basically take PC apart, clean, re-assemble, reformat. My new hdd of 3 days is apparently already corrupt and damaged yet readable and even starts up properly sometimes with other times the computer saying nothing is there!!.. God knows what's going on