i would suggest downloading 2 things
1) CCleaner - it deletes temporary internet files to free up disk space to make ur comp run faster
http://download.cnet.com/ccleaner/
2) Gamebooster - while you run it, it shuts down programs u dont need in the background to help ur pc run what aver u need faster once ure done click restore and ur pc's back to normal
http://www.iobit.com/gamebooster.html
Thats pure quete from Pepper's post ages ago, sorry to copy it 
haha ive been looking for ages to find that post i forget where it is haha xD and dw copying it saved me finding it :LOL: :LOL: idk if the links are still valid if not type "ccleaner" or "gamebooster" in google and you will soon find them haha (BTW gamebooster is what it says in the title its only really designed for whilst on games but i think if you upgrade to pro there are some things which help the computers runnung system but idk it costs and i have never bother haha xD )