Quote from mcintyrej :

Okay, spoke to my dad about the problems. Just as I thought, he totally thinks that my PSU has nothing to do with it, he just thinks the PSU was cheap for no reason. He actually had the nerve to tell me that he thought it was MSN freezing my computer.

Anyway i can convince him that its the PSU? No tests I can run?

You should be able to check the motherboard voltages in the BIOS, but there won't be much load on the PSU at that point. Still, if any of the voltages are off by much in BIOS it should be an indication that your PSU is dodgy.

What I would recommend is to download some system monitoring software, either from your motherboard manufacturer's website or a generic program like SpeedFan to monitor your system voltages when the system is under load (i.e. gaming).

According to some advice in another thread, my PSU might be knackered too, so I might have to take my own advice and check my voltages when I get home this evening