When i got home after a long DAY at school i was going to hop on a game called League of legends but when i get in a game it goes so slow it is impossible to play. Its not laggy, but the characters are like in slow mo. Same with wow here is a link on you TUBE ( http://www.youtube.com/watch?v=qwbd9VWjliU ). This happens on a lot of thing o my computer and its really bugging me. Im not sure how to post my computer information but i know this
Intel(R) Pentium(R) Dual  CPU
E2160 1.80GHz
6.01 GHz, 0.99 GB OF RAM
Physical Address Extension
I have seen this happen when you have a CPU that is running hot. The CPU Thermal Throttles and slows the CPU's executions down in an attempt to cool itself by processing less executions per second. I'd check your system temps with a utility like speedfan to make sure its not roasting with the games launched and underclocking itself to thermal throttle.I'd probably open the case and give the innards a nice cleaning ... get RID of all the dust there if any and to be sure there's DECENT airflow.

Just a thought... wouldn't hurt...