If you have this OS, there is a great article that gives a high level list of items that you can do to boost your Windows 7 performance.
By reading this list and implementing some of the suggestions, you can increase performance in a very short period of time.
Following are some of the topics included in the article: Keeping your drivers up to date, Windows 7 Ready Boost, control what to runs on your computer at a startup, defrag your hard disks, remove unwanted old files, 64bit Windows 7 and more…
Read the article here. Hope you find it useful.