KB Parallels: Windows 10 hangs with black screen on ...
https://kb.parallels.com/12423826.05.2020 · Symptoms. Windows 10 virtual machine starts with black screen, forcibly stopping the virtual machine and starting again makes the issue to be gone, but next starting/restarting of virtual machine will stuck again with black screen.. To know how to forcibly Stop virtual machine check the following article.. Cause. Windows 10 fast startup feature enabled.
Parallels Black Screen Troubleshooting
https://kb.wisc.edu/helpdesk/page.php?id=9006728.02.2019 · Parallels Black Screen Troubleshooting This document details how to fix the common issue where a Parallels Virtual Machine is stuck on a black screen. When a Parallels Virtual Machine is left unattended for a long period of time, it is common for it to get stuck on a black screen, where closing the application, restarting, and reopening will not fix the issue.