A guest operating system and its applications might react unexpectedly when the Workstation console size is not a standard VESA resolution.

For example, you can use Autofit Guest and Fit Guest Now to set the guest operating system screen resolution smaller than 640×480, but some installers do not run at resolutions smaller than 640×480. Programs might refuse to run. Error messages might include phrases such as VGA Required to Install or You must have VGA to install.

If the host computer screen resolution is high enough, you can enlarge the window and select Fit Guest Now. If the host computer screen resolution does not allow you to enlarge the Workstation console sufficiently, you can manually set the guest operating system’s screen resolution to 640×480 or larger.