Why do you allow W10 to update if you think it will trash Sonar.. Get your priorities straight.
My DAW is a DAW computer,, it is not for anything else. The OS does not matter really and what do updates do for me? . So if Sonar is really important to you, do yourself a favour and stop updating windows if your worried it will trash something...it probably will someday soon.
I am going to return to Windows 7 just for this reason. It doesn't update much any more and it certainly doesn't mess with the activation of my plug ins. I'm fed up with W10 screwing things that were working. I don't hate windows 10, for my office PC all is fine, I have W10 on 3 computers now and at work my laptop too. but it's a goner from my main DAW as soon as I get my new SSD drive.
You CAN freeze your computer and DAW in time. If all is working why on earth change anything. It's a tool. I don't update my guitars, pedals and amps or my car for that matter , I just maintain them!! They are the same after many good years...
The mistake as I see it is a lot of people want to use their DAW for all other computer tasks. That's fine but don' t expect to do this without trouble. Computers are cheap and will last forever with a bit of upgrading and few new parts.
Right now I have 4 Desktops and 5 laptops , they all work 100%. I have XP, W7 and w10. I maintain all of them and add more RAM and update hard drives.
So Sonar will go for a long time in my little corner of the word.
I'm gad to see one person mention Pro Tools. Now that's at least common sense. I like Pro Tools, a good friend has it and it's very cool because he has a X32 integrated and whatnot. But he wouldn't touch MIDI with a 10 foot pole. If your an audio only dude then might as well go with the crowd. Mix BUs seems similar to me.