I just found this command, which cleans up the files kept around in case you want to roll back your service pack update. Run it from a command prompt started as administrator (ie hit start, type cmd, right click on command prompt, choose "run as administrator")
dism /online /cleanup-image /spsuperseded
There's also the disk cleanup tool, which is you right click on your drive, choose properties, then choose disk cleanup.
Turning off hibernate if you don't use it saves a heap of disk space. You can move the swap file to another disk too.
Does anyone have any other tips to save disk space under Windows 7?


