"CCleaner is a freeware system optimization, privacy and cleaning tool. It removes unused files from your system - allowing Windows to run faster and at the same time freeing up valuable hard disk space. It also cleans traces of your online activities, such as your Internet history. Additionally, it contains a fully featured registry cleaner. But the best part is that it's fast (normally taking less than a second to run) and contains NO Spyware or Adware! :)"
CCleaner Home Page
CCleaner download page
I have found that this actually deletes your Internet info and other items a lot faster than using Internet Explorer’s option! This can also delete files that are hidden on your computer from programs that have been uninstalled. This also allows you to stop or delete processes that startup when you turn on your computer. It also finds unused files that are just taking up space. This program will also delete programs off of your computer, much like Add/Remove programs.
The program itself is only about 3MB. The program is extremely easy to use and once you adjust your custom settings it will save them for every time it runs. This will also give you information on your ram, processor, and more.
Overall, it is a great tool to have on your computer, just make sure you read carefully when checking the boxes for cleanup. If you don't understand what it does, leave it unchecked. I am not trying to advertise for this program, use at your own risk.
You can also do the following:
Remove System Restore Points
Note: Be careful to uncheck unwanted tool bars while installing.