This article will show you how to Install \ Upgrade Microsoft Threat Management Gateway (TMG) 2010 Service Pack 1 to Service Pack 1 Update 1 on a Windows Server 2008 R2.
To view the Service pack 1 installation guide go to:
http://www.ntweekly.com/?p=1608
First download Service Pack 1 Update 1.
http://www.microsoft.com/download/en/details.aspx?id=11445
Run Setup file.
Accept software Agreement.
Select Storage and Connection Credentials
Start Installation.
Installation Completed.