Hello DaveLembke
Thanks for getting back to me.
I have Malwarebytes, MS Security Essentials, and Superantispyware. Occasionally, I also run TFC.exe and Spybot. MS Security Essentials is running in the background all the time, and once or twice a week I run the others. I haven't got Norton or McAfee (or want them!).
None of these applications have picked up anything other than malware.
It may be, however, that a virus in the past has changed the default template normal.dotm because this has been going on for months.
The link you kindly posted refers to the type of problems I am experiencing every time I open and close Word, but that is not the case with me. It happens only when I upload a file. For example, a Web site asks me to upload a Word document. I click on 'Browse', navigate to my file(s), select one and that's when I get the first dialogue-box popping up, followed by the other boxes whose screenshots I attached.
It only occurs when uploading files.
Thanks again.
High1