I have done a dual installation with W7 and W10 on my PC. I have been using Hauptwerk V4.2.1 on W7 for several years with a MOTU 828mk3 hybrid sound module without problems, of which I use its internal reverb with the organs that my 32GB of ram does not allow me to install completely. Microsoft insists that I should switch to W10, even though I neither like it nor need it. Today I reinstalled HW in W10, sharing folders with the W7 installation on a second disk, but when I boot it it tells me that it cannot find a functional USB license, although it is still installed in the USB PC port.
Is it possible that the active license on the USB dongle only works with one operating system even if it is on the same PC? If now it is difficult for me to start the PC to play the organ, if I also have to migrate all the other programs from W7 to W10 and activate the USB dongle in W10, I think I will go back to playing directly on my Viscount.