X2 Upgrade

Similar to a previous message, after a new upgrade to X2 on Vista OS, when trying to insert new references into Word 2007 I get an error msg “Invalid class string” I also get the message when clicking on just about any other item in the Word X2 add-in menu. Any suggestions or help?

I’m getting the same error under the same conditions, though this has only started in the last few days. I suspect most likely following an automatic Vista upgrade/update. I’d appreciate any clues to a fix please.

Vista is the problem (how many times have we heard that?). In order to resolve the problem I had to disable my “User Account Control.”  I am not entirely comfortable with that resolution but I did it based on contact with tech support.