A better question is why is MS Cleanmgr so slow??????
CCleaner's so fast because it does almost everything in Win32 API, and file deletion is pretty quick in general (in Windows, files are not zero-filled or actually deleted, but simply *marked for deletion* via the filesystem) -- MS Cleanup Wizard is slow because it does additional things such as checking for compressible files, and compressing them, etc.
file deletion is pretty quick in general (in Windows, files are not zero-filled or actually deleted, but simply *marked for deletion* via the filesystem)
I wish CCleaner could overwrite things.
This takes ages, but it shreds ALL free space:
After files are deleted by CCleaner, shred the free space using Sysinternals' command-line utility SDelete.
Extract sdelete.exe to C:\windows\system32 (if in XP) or C:\windows\command (if in 98) and start a command prompt session (Start, Run, CMD, if in XP, or Start, Run, COMMAND, if in 98) then type SDELETE -z
This takes ages, but it shreds ALL free space:
After files are deleted by CCleaner, shred the free space using Sysinternals' command-line utility SDelete.
Extract sdelete.exe to C:\windows\system32 (if in XP) or C:\windows\command (if in 98) and start a command prompt session (Start, Run, CMD, if in XP, or Start, Run, COMMAND, if in 98) then type SDELETE -z
Please don't link straight to the exe file. A better link would be to the Sdelete product page (eg. SDelete).
I use Eraser for overwriting free space. It does take some time.