If the “Auto-resize Guest Display” is greyed out for you, go ahead and reboot your virtual machine and check if the issue is resolved. In case that doesn’t work, go ahead and restart your VirtualBox.

If VirtualBox stuck on Saving state, your machine is in the hung state. Kill the VM via the Command Prompt, disable Core ...

VirtualBox is a product from Oracle that allows you to run one or more virtual machines on a computer. Many businesses use it to run various operating systems on one machine to access specialized ...