To delete unnecessary files on a hard disk use?

1. Open the Disk Cleanup by clicking Start, point to All Programs, point to Accessories, point to System Tools, and then click Disk Cleanup. Disk Cleanup will then calculate how much space you will be able to free on your hard drive.

2. Select the files by clicking the check box that you would like to delete (e.g. Downloaded Program Files and Temporary Internet Files) and click OK.

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