Why doesn't Disk Cleanup remove my .tmp files?

After you run the Disk Cleanup tool in Windows Millennium Edition (Me), temporary (.tmp) files in the %WinDir%\Temp folder and in other folders on the hard disk may not be deleted as expected.

CAUSE

This behavior occurs if the temporary files are less than seven days old. The Disk Cleanup tool does not delete temporary files that are less than seven days old.

RESOLUTION

To resolve this problem, use one of the following methods:

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