With Windows Vista Service comes a very handy tool which is called VSP1CLN.EXE, short for Vista Service Pack 1 Cleaner. The tool can be found in %SYSTEMROOT%\System32 and when run it makes Windows Vista Service Pack 1 permanent on your computer. In short that means that all files that are backed up during SP1 installation are removed and you will gain several gigabytes of disk space. It also means that you cannot uninstall Service Pack 1 after you have run VSP1CLN.EXE. This tool should pass anyone by!