We have several older DC7600 slim desktop systems and we were using one to run our building access control software. That computer had a hardware issue so we took the hard drive out and put it in another, identical, system.
The software uses a serial port to communicate with the access control systems, and we noticed that on the new computer the serial port does not show up under device manager. We checked the BIOS to see if it was perhaps disabled, but we did not see any settings in the BIOS related to the serial port.
What could be causing it to not show up in Windows device manager?