Someone please help. Just upgraded to v10 and now my existing Windows 8.1 VM will not let me log-in. I enter my credentials and then get the "Welcome" message with the spinning circle and then nothing happens. It's been over 10 minutes waiting for this to boot. I also tried shutting the VM down and it did succeed, but it took over 5 minutes to complete. I tried resetting the VM and no luck. Please help!!!!!!