The BOOTP/DHCP is unable to function because port 67 is being used by another process
Throwing this in here because I have a plethora of problems with BootP since Win10.
It is rare that I use Boot/P, we don't need to install a lot of new devices, as we are an OOM.
Had an old 5/05 that should of had an IP address but did not and was not immediately discoverable by other means. Could not read through the serial port because it was set up as half duplex and apparently RSlinx and/or my cable would not work on half duplex (auto find could not see any PLC's). We tested the serial port of an identical 5/05 and see the same issue, moving that to Full duplex would allow a connection. We looked at the last program back up we had and found that it was indeed set to half duplex. So, suspecting that PLC did not have an IP address, I received an error which is the first line above. It also said it was a service host with PID 10262 that was using it. I opened my services and looked for PID 10262, it was being used by a "Shared Services" function, which I stopped. Then BootP opened and worked fine.
Reality is, that if I reboot, this service will likely restart and cause the same issue and I don't think I can keep it off all the time.
If I can find a way to reassign this service, I'll post more here.
Good luck