Clear Temporary Files on Windows 7
Programs often store temporary files on your hard drive. Over time, these files can start to take up a lot of space. If you are running low on hard drive space, clearing temporary files is a good way to reclaim additional disk storage space.
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Press the Windows Button + R to open the "Run" dialog box.
All temporary files will now be deleted. Note: Some files may not be able to be deleted. If you are prompted about files that are missing or in use, click the check box next to "Do this for all current items" and click "Skip."