Windows should automatically assign the various Comm and other ports and IRQs.
Have you check the modem and ports' properties in Device Manager and checked that there are no conflicts etc from the individual tabs?
Surface Pro 5 News - release date, UK price, features, specs
Gear VR vs. Daydream: Which delivers the best VR experience?
Best Mac antivirus 2017
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.