If you've ever had trouble getting a VSTO solution running on a machine, there is now a tool that can help you out.

http://www.microsoft.com/downloads/details.aspx?FamilyId=C9FB6A54-8069-4918-A6F9-E744928DFAC3&displaylang=en

The Microsoft PSS VSTO 2005 Client TroubleShooter tool is an application designed to help diagnose potential client-side issues when you deploy a VSTO 2005 solution. The tool scans the client computer for the prerequisites required to run a VSTO 2005 solution and reports the state of the prerequisites in the form of an HTML report. The tool also provides links to information about how to resolve an issue when a prerequisite was not found on the client computer.

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