That's it...

[Sup3r 4ut03r]

I'm sick and fucking tired of everyone with their, "OMFG VISTA SUCKS IT HAS GLITCHES OMG HELP ME MY OS IS HORRIBLE OMFG@!!!!!!". Here, Windows Vista SP2, run the file at your own risk, then run windows update. DO NOT USE ON NON-VISTA MACHINES.

Just... save it as .bat...

Open it, check for malicious code, then go to File, go to Save As.. and save it as Vista SP2 Keys.bat. Run it, then run windows update. That'll give you Service pack 2.

AGAIN, USE AT YOUR OWN RISK, AND NOT ON NON-VISTA MACHINES.

If you do not want to download anything, copy and paste this into notepad and save it as Vista SP2 Keys.bat.

@echo off

reg delete HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\VistaSp2 /f > NUL 2>&1
reg delete HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\WindowsUpdate\VistaSP2 /f > NUL 2>&1

reg add HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\VistaSp2 /v Beta1 /t REG_SZ /d C21A5C64-2530-CC19-042F-9ABDB4ED27F9 /f
IF NOT %errorlevel% == 0 ( goto ERROR)

:SUCCESS
@echo.
echo ================================================== =========
echo Windows Vista SP2 registry key has been set successfully.
echo Please check for updates in Windows Update.
echo ================================================== =========
@echo.
goto END

:ERROR
@echo.
echo ================================================== =========
echo FAILED to set Windows Vista SP2 registry keys.
echo Please run this script by right clicking and selecting
echo "Run as Administrator".
echo ================================================== =========
@echo.
goto END

:END
pause