My PC keeps crashing

[Angrist]

Ok, now I'm making backups. I'm pretty scared: this afternoon it took 2 hours before it even sent a signal to the monitor.
I tried unplugging all my hardware, even the internal things.
Oh, I also tried removing 2 of my 4 RAMs, but that didn't work at all.
In the end I started to suspect the HDD. It makes funny noises... So hence the backups.