Windows Server 2008 R2 SP1, Windows 7 SP1 | Download Service Pack
Service Pack 1 (SP1) for Windows Server 2008 R2 and Windows 7 helps keep your PCs and servers on the latest support level. It provides ongoing improvements to the Windows operating system (including previous updates delivered over Windows Update and incremental updates to the Windows 7 and Windows Server 2008 R2 platforms based on customer and partner feedback) and makes it easy for organizations to deploy a single set of updates
Windows Server 2008 R2 SP1, Windows 7 SP1 | Download Service Pack