Windows 7 and Windows Server 2008 R2 SP1 helps keep your PCs and servers on the latest support level. It also provides ongoing improvements to the Windows Operating System (OS), by including previous updates delivered over Windows Update as well as continuing incremental updates to the Windows 7 and Windows Server 2008 R2 platforms based on customer and partner feedback. This enables organizations to deploy a single set of updates. 

:A smaller, more appropriate download is now available on Windows Update. The best way to ensure you get Windows 7 and Windows Server 2008 R2 SP1 is by turning on the Automatic Updates feature. You can use ourstep-by-step instructions or, if you prefer, let us do it for you. If Windows Update is not offering you the option to install the service pack, see KB 2498452. If you are encountering a problem when installing the service pack from Windows update, see Troubleshoot problems installing a service pack for Windows 7 or Windows Server 2008 R2.

Steps to take before installing Windows 7 Service Pack 1 from the Microsoft Download Center

If you choose to install Windows 7 SP1 from the Microsoft Download Center Web site, there are steps that you can take to make sure that you have a good experience when you install the service pack. This article, KB 2505743, provides some suggestions to improve your experience when you install Windows 7 SP1 from the Microsoft Download Center Web site.

In order to download and install Windows 7 and Windows Server 2008 R2 SP1 you must currently have a Release to Manufacturing (RTM) version of Windows 7 or Windows Server 2008 R2 already installed. 

If you have previously installed a pre-release version of Windows 7 and Windows Server 2008 R2 SP1 on your machine, you must uninstall that version before installing SP1. 

Windows 7 and Windows Server 2008 R2 SP1 is available for installation in the same languages made available at original launch of Windows 7 and Windows Server 2008 R2.

Windows 7, Windows Server 2008 R2