Avast acquired AVG in 2016.

Looks like I should have read the entire article and actually paid attention while doing so.

According to BleepingComputer this was fixed in KB4522355. So far it appears to be working on all of the systems I have tested it on. I hope it's acceptable to link to their article on it.
...

Duh. I need more sleep or more caffeine.

I don't see how slow internet would have much of an impact with an upgrade/update performed from an ISO image, USB, or Optical media that has already been downloaded.

The only time I've seen it take even close to that long was on a system with a very old hard drive that barely passed SMART.

I updated several old Dell and HP C2Ds with 2 to 4 gigs ram built between 2006 and 2008 from 1809 to 1903 in just over an hour each using an ISO mounted as an image.

I just copied the ISO image to the desktop, mounted it, and installed from that. Worked like a charm.

Duh, who said I didn't? I'm not downloading them multiple times. I have the ISOs saved to my NAS and created a couple of USB sticks as well. I only downloaded one from each source.

Thanks for confirming it. I was beginning to think it was only me.

Finally. This has been driving me nuts. Thanks for the info.

I think I'm making some progress. All of the systems I've updated to 1903 have the "choose when updates are installed" option disappear within a few minutes of setting either option to anything other...

I went into GPO and changed the "Select when Preview Builds and Feature Updates are received" and "Select when Quality Updates are received" settings Windows Update for Business from not configured...

Yes I do use Macrium on regular systems. But for a test system like this one that only has a few programs installed it isn't really worth it. I can do a clean install on it in about the same time as...

I don't have a backup image for that system as it's essentially a test system for situations like this. I mainly want to figure out how to fix it as I'm sure I will run into it in the near future on...

Two down, one to go. Working like a charm. And yes, both systems had the settings other than the Default Zero.

- - - Updated - - -

Well third time was not the charm. This one is still not...

So far so good. I did the repair install on one of the systems with the problem and it restored the settings. Time to start on the other two.

Thanks Caledon Ken. I'm going to try that right now.

Bree, is there a fix for this other than rolling back to 1809, setting them back to 0, then updating again? I'm suffering from this as well.

I agree that the problem might be the thumb drive. I've found that a lot of older systems that only have USB 2.0 (like this one does) can run into this problem when installing from some USB 3.0 thumb...