I am running Parallels 10.1.1 under OS X.X.1 on an iMac. While running Windows 8.1, if I walk away from the computer for several hours, the Parallel VM becomes unresponsive. It will not respond to key presses, mouse clicks, its. Parallels itself is not frozen. I can use the dropdown keyboard menu to send a control-alt-delete and there is no response. I cannot shutdown or restart the VM only reset, pause or suspend. I obviously can save my work before walking away. It does not alway become unresponsive, but it can and it does happen (three times so far).
