When you install a new operating system such as Vista, the program stores the old files in a folder titled "Windows.old." This protects you in case there is information in the old files you might want to recover or the new operating system fails to perform correctly. Vista incorporates the process of removing files from the old operating system, such as Windows XP, into one of the maintenance applications. Removing Windows XP will free up space on your hard drive. It is something you should do once you are comfortable with your new operating system.
Click the "Start" button at the bottom of your desktop.
Select "All Programs" from the "Start" menu, then "Accessories."
Choose "System Tools" from the "Accessories" menu.
Navigate to "Disk Cleanup" in the "System Tools" menu.
Select the option for "Files from all users on this computer" from the "Disk Cleanup" dialog box.
Move down to the "Drive" section on the "Disk Cleanup" screen. Click the hard drive for your computer. This will probably be drive C. Press the "OK" button.
Click the "Disk Cleanup" tab, and check the box next to "Previous Windows installations." When you click your pointer on the box, a checkmark will appear.
Press the "OK" button to continue.
Select "Yes" when the program asks, "Delete Files?"
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