I had to wait for my son to assist me with the update. I used Win 10, which was not listed on site's page for OS, but it worked ! Now for a question that I am not sure where to ask it. Not sure it is from the update. We could not get audio from the TV to play on 975 via HMDI. The TV is a 4K LG using an HDMI ARC connection to the 975 HMDI ARC. We also tried TV HDMI ARC to 975 HMDI 4, no luck. I do get OSD from 975 on TV. I connected a laptop's HDMI to 975 HDMI ARC, no good, but the laptop to HMDI 4, it worked. Is it that the 975 is not hdcp 2.2? I also used another HDMI cable to make sure it wan't bad. (What HDMI cable would be recommended?)Finally, I used an OPTICAL cable from the TV to 975 and that works. Thanks for any /all assistance. Merry Christmas and Happy New Year. Dave