Windows can be a real dirty system regarding wasted disk space as you might have noticed. A current case showed amazing numbers. The common TEMP-Directories, found at C:\WINDOWS\SYSTEM32\TEMP and some stuff in the users home directories can hold quite a large number of unneeded files – in our case here it was about 20 GB trash occupying the disk for no reason. Regarding the huge number of folders and files, it was nearly impossible to delete those junk files using the Explorer. An easy way around such troubles is the ‘deltree’ command found on the Windows disk.