[destroyer125]

We have had 3 machines here in our shop connected to one PC for years now. A few days ago, I fired up the PC and was preparing to send a program to one machine and the DNC failed to connect to the machine. I assumed that maybe a wire got broken but upon further inspection, I had lost connection to all machines at once. I opened the device manager and noticed that the "Ports and LPT" tab was completely missing. I have attempted to reinstall drivers from microsoft and have issues installing any form of legacy software. It comes up with "The parameters are incorrect. This computer is running Windows 10. I have searched high and low on google for solutions to this problem but everything always comes up with solutions to problems with USB interfaces.

[steryd]

call microsoft for problems with recent updates.

[Jim Dawson]

I had to roll back a computer to Win7 for a problem like this. Had one computer connected to 2 machines. I don't know what Microsoft did to serial communications, but they sure screwed it up.