Please use the Bells & Whistles Outlook Add-in Utility (you can find it under the Bells & Whistles program group: Windows - Start -> Programs -> DS Development -> Bells & Whistles -> Outlook Addin Utility).
Using this tool, you can see all installed add-ins (let me know if there are other ones, except for the ones you already posted). Also, using the same tool, please disable those 3rd party addins, one by one, and see if you still get those popup windows.
I strongly suspect there is a conflict with one of them.
Regards,
Bogdan
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