Things You'll Need:
- Operating System boot disc
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Step 1
Back up the data that is on the hard drive you want to format. Reformatting your hard drive will remove all of the data on the hard drive, so back up anything you want to keep.
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Step 2
Click "Start" on the lower left-hand corner of the screen while running Windows XP, and click "Run." This will open the "Run" prompt.
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Step 3
Enter "cmd" in the text field. Hit "Enter" or click "OK." This will open the DOS command prompt.
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Step 4
Type "format c:\" into the command prompt and hit "Enter." The computer will begin to format the hard drive.
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Step 5
Insert the disk which contains the Operating System you want to install onto your computer after the hard drive has reformatted. Install the OS.










