[Warner306]

 

EDITEDIT:

I've decided to continue testing and troubleshooting since I eventually need to make the switch to Windows 10 regardless. Any suggestions on how to further troubleshoot the borderless windowed mode would be greatly appreciated. Also, if I should take this issue to a different forum/thread please let me know.

I've noticed that when in borderless windowed mode, the debug OSD reports the composition rate of the primary monitor, rather than the secondary monitor on which Kodi DSPlayer is playing (see above screenshot). Could this be the cause of the playback issues? 

 I would create an account at doom9 and post in the madVR support forum. Your usage case is pretty similar to other users using desktop media players and someone there may know if there is a solution.