I have the latest Parallels desktop and OSX versions installed. My issue occurs in guest operating systems "Windows 7" and "Debian Linux." The virtual machine configuration page "Security" includes a checkbox "Do not back up virtual machine". I CLEAR this checkbox. However, after virtual machine is shut down and restarted, the checkbox becomes SET. I would like to keep the checkbox CLEARED so that my virtual machines ARE backed up by Time Machine. Any suggestions?