Microsoft has released Windows 7 and Server 2008 R2 Service Pack 1 RTM to public which can be downloaded using following link:
You can also use direct download link:

Let us tell you again that SP1 is a joint release for both Windows Server 2008 R2 and Windows 7.
SP1 doesn't contain any new features that are specific to Windows 7 itself. For Windows 7, SP1 is simply a combination of updates already available through Windows Update and additional hotfixes based on feedback by customers and partners.
From the server side, two key new features have been included:
Dynamic memory is an enhancement to Hyper-V in R2 and allows IT administrators to pool all the memory available on a physical host and dynamically distribute it to virtual machines running on that host as necessary. That means based on changes in workload, your VMs will be able to receive new memory allocations without a service interruption.
RemoteFX is the latest addition to Microsoft’s desktop virtualization stack. Using this new feature in Windows Server 2008 R2, you’ll be able to deliver an even richer and more user-transparent desktop virtualization experience. RemoteFX functions independently of any graphics stack and supports any screen content, including rich content like Silverlight or Flash. It also enhances the end-user’s hardware experience with support for USB redirection. Because it uses virtualized graphics resources, RemoteFX works on a wide array of target devices, which means you can deploy it over both thick and thin client hosts and a wide variety of network configurations.
This article was posted by VG in following section: Windows 7.
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Kyle
YESSSSSSSS!!!!!!!!!!
Hao Zhang
Can I install this over the beta SP1?
VG
^^ You can first uninstall Beta from programs and Features -> View Installed Updates. Then install RTM version.
Hao Zhang
So it's safe to uninstall the SP1? It doesn't delete my files does it?
VG
^^ Yes. Uninstallation only restores older system files.
juman
My Start orb vanished after i installed sp1. i checked the explorer it is the same. any how i want it back
Uewd
@juman
I think you must get an original explorer.exe file.
Tanvir
HELP ME PLEASE !!!
After installing this i got symbols folder with pdb files. how to use them ???
Amiel
Will this install without any problems on a new freshly installed Windows 7? Are there prerequisites?
VG
^^ Yes. It'll not cause any problem after all it has been released to fix problems. ;)