Your woes are un-woed then? ;D
..not quite, Joe... :-/...!
For some unexplainable reason, I am now stuck in an endless loop of...>>
"To complete the installation, please restart your computer"....
..I've restarted it 150* times so far...
..and whatever it was that needed completing, still hasn't completed...apparently....

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...and no way of finding out what wasn't completed!...

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....Ongoing process...

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Paul....Thank goodness for my back-up Win XP Pro HDD...

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* or more....probably...

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Latest edit:
At the bottom of my Task Bar was an Icon pointing to a Windows program; "ADI RAS setup application".
This was the program which kept instructing me to "Complete the installation, etc, etc..."...every time I fired up Windows!
A search on the net reported it as being an application? in the Windows Folder, associated with; "Modems"...(problem?)...!
As my Modem was finally working OK, I removed the 3 "ADI RAS" Files from the Windows Folder and dropped them into a new, empty Folder on my Desktop, (just in case)...
Upon restarting windows, the annoying "pop-up window" problem seems to have disappeared!
...hopefully...the App wasn't required?
Paul....

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Tip: Whenever searching for Windows Files, its a good idea to tick the box; "Show hidden Files" in the "Windows Folder Options"....

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Win 8.1 64-bit. DX11. Advent Tower. Intel i7-3770 3.9 GHz 8-core. 8 GB System RAM. AMD Radeon HD 7700 1GB RAM. DVD ROM. 2 Terra Byte SATA Hard Drive. Philips 17" LCD Monitor. Saitek Cyborg X Fly-5 Joystick. ...and a Briggs and Stratton Petrol Lawn Mower.