I am slightly (with a capital S) tech inclined. I cannot imagine...the majority of lay people facing these sorts of issues.
So far I have had permissions problems, sign in issues, modern apps not updating issues (my comic app Cover (which I paid for unlimited comics) suddenly became unlicensed, constantly asking for to update my credentials all happening in the past week. All of a sudden I am not able to save a JPG image to my pictures folder because I do not have permission to save in MY own computer. Previously I was extremely happy and trouble-free on Windows 8.1 on my Surface Pro 3.