Finally Windows Vista Service Pack 1 is available for the general public.
More: http://technet.microsoft.com/en-us/windowsvista/bb738089.aspx
Microsoft Update: http://www.update.microsoft.com/
Download Center: http://www.microsoft.com/downloads/
http://technet2.microsoft.com/windowsvista/en/library/417467e7-7845-46d4-85f1-dd471fbc0de91033.mspx?mfr=true
http://technet2.microsoft.com/WindowsVista/en/library/005f921e-f706-401e-abb5-eec42ea0a03e1033.mspx?mfr=true
http://technet2.microsoft.com/WindowsVista/en/library/20184cb6-7038-4e82-a32c-4bc10ffe56ab1033.mspx?mfr=true
http://www.microsoft.com/downloads/details.aspx?FamilyID=b5b681f5-f366-4ad2-ba10-6a7d209de7bd&DisplayLang=en
http://download.microsoft.com/download/d/3/b/d3b63d2f-8016-4abe-9e76-cbd2fe89631e/Deployment_Guide_for_Windows_Vista_Service_Pack_1.doc
http://technet.microsoft.com/en-us/windowsvista/bb972745.aspx
Though it still doesn't solve the problem where media player keeps on playing even though it had been closed