Speed up Disk Cleanup by disabling compression of old files

Speed up Disk Cleanup by disabling compression of old files:

Switch to :
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\VolumeCaches\Compress old files

in regedit

and then Delete the value of the “(Default)” key (The value is: B50F5260-0C2111D2-AB56-00A0C9082678).