If a parallel/serial port is enabled in your virtual machine configuration, you can connect/disconnect port when running the guest OS.
Note: If the guest OS is started with the parallel/serial port disabled, you should shut down the guest OS first, then enable the serial or parallel port in the Configuration Editor (select the Enabled check box in the Serial Port Options tab or Parallel Port Options tab) and restart the guest OS.
To connect or disconnect serial or parallel port, do the following:
Note: There is another way to connect/disconnect the port. Right-click the serial () or parallel (
) port icon on the status bar to display the context menu, and select the appropriate command.