What is cleanmgr.exe?
Automated cleanup of Temp files, Internet files, downloaded files, recycle bin (XP).
/d driveletter: - Select the drive that you want Disk Cleanup to clean.
/sageset:n - Display the Disk Cleanup Settings dialog box and create
a registry key to store the settings you select.
The n value is stored in the registry and allows you to
specify different tasks for Disk Cleanup to run.
n can be any integer from 0 to 65535.
Specify the %systemroot% drive to see all the available options.
/sagerun:n - Run task 'n'
All drives in the computer will be enumerated, and the
selected profile will be run against each drive.