There are warnings all over the place (here, gearlzlutz, nuendo & cubase forums, just to name a few) warning ALL DAW users NOT TO "UPGRADE" TO WINDOWS 10!
I would not hold my breath waiting on Avid to fix anything. It usually takes a good 2 years AFTER an OS release for the DAW manufacturers to build a stable system working on it. You guys should just go back to Windows 7 or 8 or be prepared for a slow torturous slow down of work output.