I have a Windows XP Pro SP3 host machine running a Windows XP Pro SP3 guest machine. The host machine has one serial port, COM1, that I need to use in the guest machine.
When I add the serial port to the guest machine and try to start it, I get the following error:
Failed to start the virtual machine xxx Cannot open host device 'COM1' for read/write access. Check the permissions of that device (VERR_ACCESS_DENIED). Unknown error creating VM (VERR_ACCESS_DENIED).
What are some of the things that might be causing this problem? How can I check "permissions" on a serial port?