When Microsoft released Windows 11, they decided not to make any more operating systems that support running 16-bit applications by using their NTVDM (NT Virtual DOS Machine) code.

If you want to run your BBS on Windows 11, you must do one of the following:

• Install a hypervisor and create a virtual machine on top of it
• Install DOSBox or DOSBox-X
  • DOSBox - https://www.dosbox.com/
  • DOSBox-X - https://dosbox-x.com/
  • This will only allow you to run one node per DOSBox/DOSBox-X console session
  • You could run DESQView in a console under DOSBox or DOSBox-X
  • You could install Windows 3.1, 95 or 98 under DOSBox or DOSBox-X
• Install NTVDMx64 - http://www.columbia.edu/~em36/ntvdmx64.html
• Install winevdm - http://www.columbia.edu/~em36/otvdm.html