Description
Important note: This is a Release Candidate - it is not the final version of Windows Vista Service Pack 1. It should only be installed by users who understand the risks of installing beta/pre-release software. User feedback suggests that the patch is reliable and improves the functionality, stability and speed of Vista.

The Windows Vista Service Pack 1 (Vista SP1) fixes a range of bugs in Windows Vista. The file is a large download and can be applied to any version of Windows Vista. It doesn't matter what Vista updates you have previously applied to your system, SP1 will update any unpatched, partially patched or completely updated system (it includes all previously released patches and updates). However, any patches released after Vista Service Pack 1 will still need to be installed.

The advantage of this full download is that it can be used on any system - plus it doesn't require an Internet connection to install. You can download SP1, burn it to disk and use it on multiple PCs.

Windows Vista Service Pack 1 (SP1) provides enhanced security measures that will hopefully improve defences against viruses, worms and hackers, along with increased manageability and an improved experience for users.