I literally posted every single step of the issue I had so total, 100% facts. And yes, it can be operator error, but it might be some software i use causing the issue, but for it to happen twice and require a full re-format to access the games I've bought and for it to happen to a huge chunk of people points to a bigger issue or incompatability that needs fixing. In the meantime, Steam, Origin, GOG, UPLAY and Battle.net work perfectly, so while I want to like the store ready for Sea of Thieves, I'm sure I'll cope without it.
I would highly recommend that people use the Windows Store with demos for at least 6 months prior to parting with any money, just in case.