This has happened twice now. I was copying old files from 3.5" floppies, using an external USB floppy drive. I got an error that the file format was not recognized and could not be copied. I clicked cancel, and the cancel pop-up window never finished. I opened task manager and stopped Windows Explorer. Then there was a "program is not responding" pop-up. I clicked that I wanted to stop the program. A message appeared that windows had encountered a problem in windows explorer and was looking for a solution. Then Windows Explorer shut down. I tried restarting Windows Explorer and could not. None of the Start menu buttons related to Windows Explorer (Computer, Documents, Pictures, etc.) were responding. I decided to restart. Then the logging off screen appeared, and never finished. I closed down using the power button. On restart, I got a message that windows had not been shut down properly. I opened in Safe Mode, logged off, and restarted, and everything was OK, apparently, until the next time it happened.
Any solutions to suggest?