How to download the final release of Windows Vista Service Pack 1 (SP1)
Due to driver issues and other reasons Microsoft have not mentioned explicitly the public access to SP1 for Windows Vista has been delayed until "mid-March". But if you an inpatient, backup your system regularly and do not have to worry about braking it, you can try the following hack to get the final release of Vista´s SP1 a little bit earlier. Using this hack you will get the regular final release of SP 1 and not any "special version". If you have already installed a Release Candiate of SP1, you have to uninstall this Windows Vista RC first.
Executing the following script with admin privileges (save it as a plain text file with a ".cmd" extension), will allow you to get Vista SP1 via the usual "Windows Update" dialog a bit earlier:
reg delete HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\VistaSp1 /f > NUL 2>&1
reg delete HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\WindowsUpdate\VistaSP1 /f > NUL 2>&1
reg add HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\VistaSp1 /v Beta1 /t REG_SZ /d dcf99ef8-d784-414e-b411-81a910d2761d /f
IF NOT %errorlevel% == 0 ( goto ERROR)