How to Clean Windows.old and Previous Windows Installations

1) Click in Windows search field and type "Disk Cleanup" and click it.
2) When it is done scanning, click the "Clean up system files" button at the bottom left of the form.
4) When it is done scanning, check the box that states "Temporary Windows installation files" and "Previous Windows installation(s)."
5) Click OK button.
6) Click Delete Files button.
7) Click the Yes when it warns you about deleting previous Window installs.

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