Oracle VM VirtualBox failed when I added a monitor.
Under Oracle VM VirtualBox version 5.0.16 on Win10, I built and have been using a Windows XP virtual machine. I decided I wanted to add a second display to match my physical setup, and used “Settings/display/Monitor Count” to change the monitor count from 1 to 2. Now I cannot boot the virtual Windows XP.
Windows XP machine starts to load, then it quickly disappears and I get the message:
Failed to construct 'serial'/0! VERR_IOM_IOPORT_RANGE_CONFLICT (-2602) - The specified I/O port range intruded on an existing range. There is a I/O port conflict between two device, or a device tried to register the same range twice.
Changed the monitor count back to 1, but the startup error continues.
I really don’t want to rebuild the entire Windows XP machine again from scratch, because I’ll lose user files I've created within that machine.