I purchased and installed duet on my ipad pro 12.9 and got the download link and installed on PC. Reboot and it zonked my PC - would not boot - couldn't get into UEFI. took 3 hrs of tries before it finally allowed me get into UEFI and restore to a point BEFORE I installed the duet software. I have no clue what is going on, but gonna uninstall the duet. Dang - this was one justification I had for the 12.9.