Sale of Goods Act - pertaining to PC games?

Anyone know what the go is with PC games being returned, as I bought Dead Space yesterday, and despite my system being able to run it (by the minimum specs) it won't run properly - I messed about for hours - downloaded riva tuner to try and tune the graphics card - no joy....tried everything I could think of - system processes, running it at lowest FPS, you name it.....

Their are countless complaints about the same issues that I am having all over various forums etc.

When I bought it from Game Station the assistant asked me if my PC could run it and that I would not be able to return it? That can't be right though? Surely if my PC meets minium spec and it still can't run it, and many people are saying the same, they have to refund don't they?

simple solution, buy an xbox or ps3