The Compress Old Files option takes up quite a bit of time while cleaning up the disk with Disk Cleanup. If it exists amongst your options and if you dont use it or if you want to remove it, here is how you can go about it.
Run regedit and navigate to the following key in the Windows Registry:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\VolumeCaches\Compress old files
Simple delete this key.
Thats it.
Pointless, actually … but its an option, and life is all about having options ! 
If you have liked this post, you might want to check out some more, on topics like Hacks, Registry, Tips.
