Hi,
Yes, this is on the Windows side. The WDM MIDI Driver is old and not maintained anymore. And there is a process, which crashes the MIDI Driver and takes Cubase with.
If you search for the WDM MIDI Driver here on the forum, you get quite some results.
The To WinRT or not to WinRT, that is the question thread might be interesting for you.
Unfortunately some (old) MIDI Devices don’t support the WinRT MIDI Driver.
This thread is not about the WDM Audio Driver. This is about the WDM MIDI Driver. Another story. 