with error code 20 and 41, after installing v9 on Windows 10 computer, after running the amyuni install, still getting error "printer not activated"?
to solve the problem, open the registry and navigate to:
HKEY_CURRENT_CONFIG
-> Software
-> "your printer driver name" (should see alpha five printer and amyuni printer), right click on the entry and select Permissions

make sure that the Users group has the Allow check box check for Full Control

I had searched the threads and found some things to try, but this was a revelation I got from Amyuni

Hope this helps someone