I am very happy to see that the final version of Windows Server 2008 R2 SP1 is now available for everyone. You can either wait for it to appear through Windows Update – or you can go and download it from here:
Some general pointers for people:
If you are updating from a beta or RC version of SP1 you will need to follow the guidance that I provided here (note that while this post is written for going from SP1 beta to SP1 RC, the same steps and caveats apply for beta to RTM or RC to RTM).
If you have not tried out SP1 yet – some good places to start are: