Hello all, I've got this PC which my friend built from scratch in 2009. it's has been brilliant up until now. It's got an intel core quad processor Q6600 @ 2.40GHz. it also has a decent graphics card. nvidea 256 i think. It's been playing games great as well. it has played games like Empire total war, shogun 2. yet i recently downloaded skyrim and all the games have this strange lagg in them which wasn't happening before. It will work great for about 5 minutes then suddenly start glitching and becoming difficult to play. changing the settings to the lowest graphics doesnt seem to have any effect on the glitching. I've tried loads of things like the free pc cleap up software etc and reinstalling the games. I've also made lots of space on the hard drive. there's 456gb of it. is there something I should be doing? Could it be a case of replacing something? If so, i am happy to do so, i just need to be certain of what to replace in case i waste my money. thanks in advance for any help you can give.