From a command prompt on the Windows 8.1 computer run the following: ping V800. If ping fails to resolve the name V800 to an ip address then it's a name resolution problem.
If step 1 fails (meaning there's no name resolution) then run a MAC address scanner from the Windows 8.1 computer. Then look for a MAC address identified as belonging to Hyundai and make note of the ip address associated with that MAC address (some MAC address scanners will identify and display the owning organization of the MAC address). If the MAC addresses aren't identified then you can punch them in here to look them up and identify them:
https://standards.ieee.org/develop/regauth/oui/public.html
You can also browse the following list. The first 6 characters (the first three sets of characters) of the MAC address identify the owning organization.
http://standards.ieee.org/develop/regauth/oui/oui.txt
Once you've identified the ip address for the Hyundai device you can add an entry for it in the LMHOSTS file on the Windows 8.1 computer. You'll need to run notepad with elevation in order to edit and save the LMHOSTS file. The reason you want to use the LMHOSTS file is because you need to resolve a single-label name (NetBIOS), which is what the LMHOSTS file is for (as opposed to the HOSTS file which is used to resolve FQDN's). Then from a command prompt on the Windows 8.1 computer run nbtstat -R to reload the NetBIOS name cache.