Does anyone have an idea why my #Windows 10 VM in #Virtualbox only shows a black screen when booted up (login screen)?

This also happens when I resize the window.

The guest additions are up-to-date, so that should not be the problem. The host is #Debian with #Xfce, but I think this might not be the problem, because it worked from some time and other Windows 10 VMs also work.