Last week I installed Parallels 14 and Mojave, and all was OK for awhile, but now this week I have had nothing but problems. I have tried uninstalling and reinstalling parallels but to no avail. I start Parallels, and all that I get is the spinning circle saying starting Windows 10. Once this happens, my entire computer starts to experience issues - spinning beachballs everywhere. I have to shut down and restart, and sometimes the only way that I can do a shutdown is with a hard shutdown by holding down the Touch ID button on my MacBook Pro. As long as I don't try reinstalling or running Parallels, the Mac is fine, but once I try, all Hell breaks loose. Thinking about downgrading back to High Sierra from a Time Machine backup as I am at wits end. Thinking Windows is somehow corrupted, but not sure what to do to solve that.