Obviously, end users or business customers that want to take SP1 out for a spin, need to already have copies of Windows 7 RTM and Windows Server 2008 R2 RTM in place, as there are no slipstream versions of Windows 7 SP1 or Windows Server 2008 R2 SP1 available. Windows 7 Service Pack 1 (SP1) Beta is now available for download from Microsoft along with Windows Server 2008 R2 SP1 Beta, and is important to understand the resources that the upgrade requires of early adopters for testing.