I seem to have found a fix that so far has been working for me.
Go to the control panel/System and Security/Find and Fix problems/Hardware and Sound/Configure a Device.
Then click Next and go through the process. Mine said it found a problem with a device, and fixed it, and then I rebooted. After that, the camera worked fine and is still working. Seems like it honed right in on what was keeping the camera from turning on and fixed it.
This did the trick! Many thanks for sharing.