I've noticed that a lot of people with awesome computers are having trouble running even the least resource heavy games. Here what I do often to keep my computer in best shape. (See bottom for download locations)

1. Run CCleaner to clean out internet history.
2. Run CCleaner to clean out broken registry objects. (Make sure to back it up too. It will give you a prompt)
3. Run AVG 7.5 to find and eliminate viruses.
4. Run Spybot- Search & Destroy to delete cookies and stuff.
5. Run Disk Defragmenter to keep files organized.
6. Uninstall any crap that you don't use anymore.

This makes a huge difference, trust me. I recommend doing this at least once a month. The more the better though!

DOWNLOAD LOCATIONS:

CCleaner 1.39

AVG 7.5 Free

Spybot- Search & Destroy