File Size: 435 MB
This is the Windows Vista Service Pack 1 Build 6001.18000, RTM. Released to manufacturers on 04/02/2008 but wont hit windows update until early to mid March.
Download Links
http://www.filefactory.com/file/9a941a/
http://www.filefactory.com/file/a6ae4f/
http://www.filefactory.com/file/4d017a/
http://www.filefactory.com/file/ba1c37/
http://www.filefactory.com/file/8e5d33/
435 MB