KB4338819 downloaded from the microsoft update catalog with error 0x800f0922 .
First time was through windows update, after that failed at 95 % with message, we could not install updates, rolling back.
Download KB4338819 on another pc and it installed fine as well as the flash player and malicious software removal tool.
2tb c drive with 999gb free so not a space issue but two partitions exist, f 455mb and h 2gb (part of c).
This pc is on a local account but getting daily messages to log in to a microsoft account.