Peter:
If you don't mind doing a little detective work, please do the following:
If you don't mind doing a little detective work, please do the following:
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Run the Setup.exe program again. When you get the "Error 1001: The installation of the ClickOnce solution failed" message, STOP. Do not close the error message.
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In Windows Explorer, navigate to one of these folders. Your computer will have only one of them: "C:\Program Files\Social Media Research Foundation\NodeXL Excel Template" or "C:\Program Files (x86)\Social Media Research Foundation\NodeXL Excel Template". If it's a new computer, it will probably be the second folder.
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Double-click this file: "Smrf.NodeXL.ExcelTemplate.vsto". You should get a message, probably with a "Details" button. Please copy the message and details here.