I currently have a laptop running Windows Vista SP2. When I get back to college I'm going to be buying and installing Windows 7. I have read that running this program will delete some of the files in the "winsxs" folder and free up some space for me. At this moment it is currently taking up more than 12% (13 GB) of my hard drive. It was mentioned that you could not uninstall SP2 after the clean up had been done. I'm concerned that if I do run COMPCLN that it will render my computer unable to be updated. Is this true or am I safely able to run this in order to gain the space I need? Thank you.