Nanaki316 said:
Stupid question but thought it was worth asking, can it depend on what sort of power supply you plug a brick into? I.e a wall socket on it's own or in an extension with like 5 other plugs in it?
I've never heard of anything like that, but it goes without saying you shouldn't overload a socket, nor should you run electronics on the same circuit as machinery (e.g. tumble dryer)... but as long as you're not doing anything daft like that I wouldn't worry about the quality of the power being an issue.
If it is overheating can you narrow it down to either the CPU or GFX card? It sounds odd to me that it would be overheating so quickly with such as undemanding game as WoW... I think the only way that could be is if you have a dead cooling fan or something. I have some mates who I play L4D2 with and they get issues with overheating but only after about 20 minutes+ of gaming - they solved their problem BTW by getting cooling mats to put their laptops on, might be worth looking at if this is a heat issue (i'm not convinced of that mind).
Do you get anything in event viewer other than the application hang?
Also, try running WoW with your battery out and just the power cable in. Just to eliminate power from the equation.