I've installed Win 10 Home this morning in about 40 minutes. Everything went well and everything is working. The only issue I had was Microsoft Money 2007, as the program was looking for components of the IE version 6. That was easily fixed by a registry value change.
As far as DVD player is concerned, this VLC player works and is free:
http://www.videolan.org/index.htmlCould care less about playing Solitaire, etc ...

My DAW programs are working, so is BIAB/RB. Even the latest driver for Win 8.1 for my AKAI EIE Pro USB sound interface works beautifully with Windows 10. The sound seems even better as it was with Win 8.1. I can take the volume on the unit down quite a bit in W10 compare to W8.1.
All in all, my machine is running smoothly and very fast. At least to me, it seems the entire system runs a lot quicker.
I tested all of my applications. No problems at all. Maybe, I just got lucky
