Disk Cleanup

On the Start menu, select All Programs, choose Accessories, select System Tools, and then click Disk Cleanup.
The Disk Cleanup program is used to free up space by files that are no longer being used in the hard drive.
In the Disk Cleanup dialog box, click the Disk Cleanup tab.
In the Files to Delete list box, click the location of the files to be deleted. (IMPORTANT : Do not check the box next to “Compress old file”.)
Click the OK button to start deleting.
Click the Yes button.