I am using KVM mode and when I connect to a secondary machine I get a black screen and no response. ctrl-alt-del and ctrl-alt-backspace don't work. If I have a monitor hooked up directly to the secondary, everything appears fine there and the machine is not in a locked state. I've checked the firewalls, and it is turned off.
This had been working fine before and the black screen issue only appeared after a Windows 10 update from this week, but I can't be sure if that was the cause of it.