Cleanup of drive

Hi Gurus,

I was told there is a procedure to cleanup the drive after a successful install of sap, this is my current config..

win2k3 server

c:\ == 150 gb

d:\150 gb

the D drive has Oracle on it and the drive is almost full at 138 gb, i was told there is a command to run to cleanup the drive as sap puts a lot of unnecessary files in the drive that are not needed for it to run, Is that true if yes then how do we cleanup ?

Regards

Ravi