I have parallels business edition version v 13.3.2 (43368) Recently I upgraded macos to High Sierra and that's where my problem started. Several times a day my machine reboots with no warning when I work in parallels/windows 10. I tried to file a ticket with parallels team but my options are limited to facebook messenger and twitter both of which I do not have and am not going to get. So this forum is the only channel of communication with the parallels team for me. So any hint how to resolve the issue ?