Windows Vista SP2 is available for public download at Microsoft Download Center. You may choose either download Vista SP2 as an ISO image for burning onto a DVDor as a standalone installer .

This is around 350MB file and you must have Vista SP1 installed if you want to to install SP2. Microsoft says they did this to reduce size of installer and if you don’t want to download then you may install it from Windows Update.

Windows Vista SP2 will solve lot of problem related to compability and speed. It will improve your performance, but I still prefer Windows 7 this time.