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How to tell if sp1 for BizTalk 2004 has been installed already
by Andy Babiec on Wednesday, February 09, 2005

The Microsoft readme that comes with sp1 for BizTalk Server 2004 does not specify how a user can determine whether the service pack is installed already.

From what I've been able to determine, the quickest way is to fire up regedit and check if the following key exists. If it does, then sp1 has been installed.

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\BizTalk Server\3.0\SP1