Windows Vista blog reports that the first service pack for Microsoft's Windows Vista operating system has "gone gold", meaning that development of the first major update for the OS has been completed. Previous release candidates have been released to the public already; the final version should be released soon. Microsoft CEO Steve Ballmer also stated that Windows Server 2008 has also been completed; it will officially launch on Feb. 27.

With today's RTM of SP1, a number of processes kick off as we deliver the update to customers. Our OEM partners will get SP1 and start producing new PCs running Windows Vista with SP1 pre-installed. We will also start the manufacturing process for retail product of Windows Vista with SP1. Both will be available in stores for new Windows Vista customers in the coming months. Today we also start the process to manufacture DVDs for our enterprise customers who get our software via our Volume Licensing program.

As we update our customers to SP1, we want everyone to have a great install experience. We are going to stage our rollout of SP1 for current Windows Vista users to be approximately concurrent with the availability of Windows Vista SP1 on new PCs and in stores. There are a couple of reasons for this. Our beta testing identified an issue with a small set of device drivers. These drivers do not follow our guidelines for driver installation and as a result, some beta participants who were using Windows Vista and updated to Service Pack 1 reported issues with these devices. Because the issue was with the way the drivers were installed and not the drivers themselves, the solution was simply to reinstall the drivers. While this worked fine for our more technical beta testers, we want to deliver a better experience for customers as we make the update broadly available.

While we know that most customers who update from Windows Vista to SP1 will NOT be affected, our approach is to improve the experience for all our customers. To do this, we will begin making SP1 available through Windows Update in mid-March, giving us time to work with some of our hardware partners to make adjustments to the installation process for the affected drivers. As SP1 gets delivered through Windows Update, we will only offer it to PCs that we detect don't have any of the affected device drivers installed. We're taking the next month or so to continue our work of identifying as many of these devices as possible.

Here's the timing for SP1 availability for current Windows Vista users:
- In mid-March, we will release Windows Vista SP1 to Windows Update (in English, French, Spanish, German and Japanese) and to the download center on microsoft.com. Customers who visit Windows Update can choose to install Service Pack 1. If Windows Update determines that the system has one of the drivers we know to be problematic, then Windows Update will not offer SP1. Since we know that some customers may want to update to SP1 anyhow, the download center will allow anyone who wants to install SP1 to do so.
- In mid-April, we will begin delivering Windows Vista SP1 to Windows Vista customers who have chosen to have updates downloaded automatically. That said, any system that Windows Update determines has a driver known to not update successfully will not get SP1 automatically. As updates for these drivers become available, they will be installed automatically by Windows Update, which will unblock these systems from getting Service Pack 1. The result is that more and more systems will automatically get SP1, but only when we are confident they will have a good experience.
- The remaining languages will RTM in April.