This tip is for those who had installed SP 1 but have not yet installed SP 2. After installing SP 1 on Windows Vista, one will be able to uninstall it at a later stage. However, for this to be the case, Windows will create a backup which eats up considerable disk space. [...] Related posts:

1. Windows Vista to Windows 7 upgrades
2. Vista SP 2 not always available via Windows Update
3. Vista SP 2 on Italian and other languages