How long does an update to Uverse DVR take to complete

Hello Everyone~

I was watching a recorded movie then took my dog outside and when I came back in there was a gear on my tv screen, which then turned into a red X.

Tried all I knew to do which is a lot :(  from researching on web for years with so many issues...Then I unplugged power to DVR and unplugged from outlet for about 45 minutes.

When I plugged it all back in, gear was still there but now there is a horizontal line moving very, very slowly on the bottom of screen.

Looks like it is an update to the DVR but timewise it is going on for nearly 1 hour so I wonder if there is an issue to the update, maybe?

Hoping for some help so I can stop dealing with this since its been about 3 hrs since mess started. ATT techs said I have issue on lines and new tech out here on Monday. But I just had a tech here 10 days ago to upgrade internet from 50 to 75, he did some work outside and inside all he did was replace the same modem I had (that was new to me from 1 yr ago with nothing wrong with it)

Seems like maybe a coincidence that I am having this craziness so soon after he was here.

Anyway sorry for storytelling here but need greater minds than mine to help on this one!

Thanks so much...