How to Run Disk Cleanup
Under My Computer, right click on your hard drive (usually c:) and select properties.
Under control panel, select Performance Information and Tools, Select Open Disk Cleanup. Select all of the features you want to remove, select everything you do not use.
Click ok, you will be prompted with a confirmation window. Click Yes.
The actual process of cleaning up your disk of all unneeded files may take 10-20 minutes. Now is a good time to walk away, and do something else for a while. When you return, you will have a faster, leaner computer.