The port is being used by another process (not via the http.sys service) the Help Agent is not be able to attach and use ...

The port is being used by another process (not via the http.sys service) the Help Agent is not be able to attach and use this port and will exit.  The port number can be changed by adding a string registry value AgentPort under HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Help\v1.0 with the value of the port to use (eg. 81).  Due to the http.sys ACL settings it is necessary to run the following http.sys configuration command from an admin elevated command line.{1}On Vista, Win2k8, and Windows 7 run the following native command:{1}netsh http add urlacl url=http://{0}:[port]/help/ sddl=D:(A;;GX;;;WD){1}On Windows Xp, and Win2K3 run the following command:{1}httpcfg set urlacl /u http://{0}:[port]/help/ /a D:(A;;GX;;;WD){1}If the command is not found then it might be necessary to download the httpcfg.exe from Microsoft as part of the Windows XP Service Pack 2 support Tools (http://www.microsoft.com/downloads/details.aspx?amp;displaylang=enfamilyid=49ae8576-9bb9-4126-9761-ba8011fabf38&displaylang=en).