A relatively “simple” solution to the problems caused by the update KB 5034441, which worked for me (see tutorial below)
Having used a copy of a recent Windows 10 installation, downloaded from Microsoft onto a USB, I carried out a “Repair Install Windows 10 with In-place Upgrade” which kept all of my files, apps and settings and then updated and installed KB 5034441 without the need to use Command Prompt, resize partitions, or do anything further. I am neither technically knowledgeable or that competent, so for further information please address any questions to ZEKRI Abdelhafid who’s method this is.
Repair Install Windows 10 with an In-place Upgrade | Tutorials (tenforums.com)