I provide computer support for a bunch of small companies. So, I am an early adopter.
Got 9 computers in the office/house.
The music computer is a triple boot box; win 7 32, 64, and win 8 64.
Just this week installed w8-64 on a laptop. Hence the interest in getting the 0404 usb working.
Found the bit about the 1820 on some forum.
I recommend ALWAYS to NOT replace everything at once. As in: do not uninstall previous versions of Sonar when installing the latest version.
And for win 8 and audio computers, install on new partition for testing and configuration.
And so on.