I ran into this problem before when sonar platinum came out ... what I had to do was use system restore to restore to a previous time.. one thing I have also learned and applied over the years is to always create a restore point manually every week, create a restore point every time I add / change stuff and to also use my daw for nothing but daw work period.. there could have been and update that was applied and corrupted the registry.. I use a program called. Cc cleaner to regularly remove broke links in the registry .. also. I don't run any antivirus , any type of Microsoft office products or anything starting up and running and checking for updates and turn off auto update in windows and chose manual updates and only download the updates you need .. I have completely avoided windows 10 because I have every plugin from sonar installed and updating and reinstalling drivers I just don't want to do at this time.. if you are like me, when the creative process hits me , the last thing I want to do is stop and figure out what is going on with a program that is suppose to work when I start it up .. eventually I will upgrade to windows 10 pro on a new computer and reinstall everything, but I will have my old trusty computer available untill that process is done.. if restore does not fix the problem , keep going back to older restore points untill you fix it, check device manager and verify that all devices are working and use windows event viewer to isolate the time and date the system had problems.. good luck getting a response from cakewalk , I still have a support ticket open from 2 months ago with no response .. I miss the days of being able to talk to a live person on the phone ..