Disk Cleanup is used to cleanup any unnecessary files on your computer. (This doesn’t include files that you have saved, such as documents or music.)
Click the Microsoft Windows Orb button as shown below. Note: If you are using Windows XP, click the Start button instead located in the lower left-hand corner.
Type Disk Cleanup in the Start Search box, and then click the Disk Cleanup under programs as shown below. Note: In Windows XP, you will need to navigate to Disk Cleanup by highlighting ALL Programs>Accessories>System Tools, and then click Disk Cleanup.
Disk Cleanup will begin scanning your system, as shown below.
Check all boxes on the left-hand side of the screen, and then click OK.
Click the Delete Files button, as shown below.
The system will then begin to delete the files. Please be patient and allow enough time for the system to delete the files. The window will automatically close when it has finished. Below is what you will see as it cleans your disk.