I don't know if this will help, but maybe it's something.
Windows helpdesk prob will not help, as they'd need to admit that W10 is 'broken' in this regard, and they don't like that.
You might follow links regarding Coolsoft, and Virtual Midi Synth, and read the various notes.
Then follow link for Coolsoft Midi Mapper, read that, and download that package and install it.
Your present driver may well have worked under W7, but subsequent systems no longer provide the 'hooks' for such systems to link into. Or if they are there, they are now hidden and NOT easily accessed. The Coolsoft Mapper creates a new process to link to, and if you re-install your DDRUM etc after the mapper is active, then it may link and work.
Let us know if this helps.
I've installed the Coolsoft Virtual Synth under XP, and it works great. I've got a W7 laptop, but I've not tried that. Yet? No plans to even touch W10. However, the Coolsoft site does claim W10 should work (W8 and 8.1 as well).