Windows 7 and Windows Server 2008 R2 Service Pack 1

Microsoft has released the first service pack for Windows 7 and Windows Server 2008 R2. The new service pack is available to everyone. The simplest and easiest way to install SP1,is the  Windows Update,which  only installs the new updates  that were  previously not downloaded. Single installable update is  also available  for users without internet connection,  but  it  is much larger when compared to windows update service

Service pack 1 includes the following new features and improvements

• Higher-definition connections with Remote Desktop
• More Windows Live ID support
• An HDMI patch  for improved reliability
• An XML Paper Specification fix
• Printing using the XPS Viewer
• "Restore previous folders at logon” functionality in Windows Explorer after restarting
• Support for Advanced Vector Extensions (AVX)
• Enhanced support for additional identities in RRAS and IPsec
• Improved Support for Advanced Format (512e) Storage Devices

If you installed any of the pre-release versions of SP1, uninstall them before installing the final release version of SP1.
Windows Service Pack 1  |  Service Pack in ISO format
For more information please check

• Windows 7 SP 1-- Microsoft Download Center
• Information about Service Pack 1
• System Readiness Tool can help fix problems that might prevent Windows updates and service packs from installing.