I attempted to open an app I use every day in Win10 but the app never appeared and Win10 hung trying to open it. I then tried to close down the VM completely but Win10 hung on the shutdown. I was unable to send a Ctrl-Alt-Del to get to the task window of Win10 which was waiting to end the app load. I then had to force quit Parallels. On reloading Parallels, the control window showed Win10 continuing to hang in "Stopping" mode. How do I get out of this situation? Thanks.