Fixed. Core is on the Grimm MU1. I went into the Windows start menu and ran Roon as an administrator which allowed me to reinstall it. After reinstalling it I had to reinstall the updates. Reinstalling updates fixed the problem.
Since others installed last night's update with no problem, I'd say that for some reason my update didn't install properly. I had to work 11 hours today to support a public meeting so I didn't spend much time worrying about it. Nice to have it back.
Right now for a few centimes you can get a drink and write your poems on the wall.
thanks all,
Jerry