Hey Guys...just thought I'd post a problem I ran into which I just got straightened out in case it might help someone 
 
I just moved into a new house along with my studio. I set everything up and it was working fine for a few days, then all of a sudden Sonar wouldn't even play an audio file..I'm using a Tascam 20x20 interface. 
I noticed that it would work a little using ASIO4All...
After going through about a day's worth of stress...found on Tascam's website that there was an issue using the Tascam and the new Window's 10 update called "windows 10 creator preview"....version 1703 I think. 
Low and behold that was the version I was running.
So I rolled back to the earlier version of Windows, and everything is back to normal.
Hope this helps somebody...I was considering reinstalling Windows...UGH!