Yeah, that guy's issue isnt a matter of "Microsoft has control over my PC!!!"; more like "I've been using a computer for years and never actually looked at how things work under the surface".
Simple permissions error, happens in Linux all the time as well.
The workaround is to log in as an administrator and give his user account the permission to modify the files. Why is it not standard procedure? Because giving normal users the permission to edit everything by default instead of just files that they own is how people used to be able to delete system32 and brick their windows install.