Microsoft delivered latest update to their Windows Vista Operating System through the release of Service Pack 1 couple of weeks ago.
Installation of Service Pack increases the amount of disk space used by Vista operating system as a backup copy of older files are saved to the disk.
You can claim almost 1 GB of hard disk space by deleting the backup files. But the catch is, after deleting the backup files you will not be able to uninstall service pack 1.
I don't think anyone will be willing to uninstall service pack 1 as it improves the performance and security. So you can go ahead and delete the backup files to reclaim 1 GB of hard disk space by following these steps
- Open windows command prompt
- Execute the command : vsp1cln.exe