Don't re-install windows!!
OK I didn't.
I ended up using a disc of programs that I owned, sent to me when I ordered My Plextor (thanks guys.
)
I guess my download 2.315 file had become corrupted. The disc allowed me to install 2.315. That played without sticking. I remembered that it doesn't handle NuTech discs well so I installed 2.400. Unfortunately 2.400 sticks for me so I will "stick" (stupid pun intended) with 2.315 until I feel that there is about $100 burning a hole in my pocket to buy another Video card. (And when Microstudio finally plays the songs to the very end)
Catch ya all in about a year.