The Windows Vista 64-bit Service Pack 1 (also called Vista 64-bit SP1) fixes a range of bugs in Windows Vista. It provides enhanced security measures that will hopefully improve defences against viruses, worms and hackers, along with increased manageability and an improved experience for users.
Vista Service Pack 1 is a large download and can be applied to any 64-bit version of Windows Vista (do not use this for 32-bit releases of Vista). Windows Vista 64-bit Service Pack 2 and subsequent security updates will also need to be installed in order to properly secure your computer. These are available in the Windows section of this site.
DOWNLOAD Windows Vista 64-bit Service Pack 1: Vista 64-bit SP1 (final release)