[oldtimes]

Originally Posted by bob47

This is about the only thing I haven't tried. The suggestion to disable my Avast antivirus should have helped but made no difference. Downloading the update direct from the Windows catalog website, the file size was identical with and without Avast working and failed to install with or without Avast disabled.

This is an HP desktop, just over a year old, with good hardware. Core I5-9400 processor with 16 GB of RAM. The items connected, all by cable, are a printer, speakers, monitor, and mouse. It has a wireless connection to the router but I think the connection quality is excellent and the downloads are coming through accurately.

In this experience I've found it's amazing difficult to shut off and keep shut off all the background processes that want to run. And this morning, after failing to install the problem update, it successfully installed the latest update to Windows Defender. A new cumulative update should come out late in March. Hopefully that one will install. Thanks for all the suggestions.

Have you checked your hard drive to see if you have run out of disk space? If all you have is 16GB of RAM your hard drive may be small as well which would prevent your computer from downloading the entire file.