I'm running Windows 10 in a VirtualBox on a Windows 10 host. I installed the guest drivers provided by Oracle and indeed Windows dynamically changes the resolution of the screen to match the size of the VirtualBox window, but every now and then it goes back to a small resolution leaving most of the window unused.
Any ideas what's going on? or how to fix it?
Update: I managed to catch a notification, apparently, the video driver is crashing and that's why it's reverting back.