When you run the Disk Cleanup utility, the program may stop responding
(hang) while scanning for compressed files.
Click Start, click Run, type regedit, and then click OK.
Locate and then click the following registry key:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Volume
Caches\Compress Old Files
On the Edit menu, click Delete.
When prompted to "Confirm Key Delete," click Yes.
Quit Registry Editor.
