I'm using Windows 10 Pro v1703 Build 15063.608 but just in the last couple of days, without having changing anything on my PC except for an NVIDIA driver update from v385.68 to v385.69 and some new Steam game downloads, several of the main apps for Photos, Skype, Films & TV and Mail/Calendar have started to fail. The error codes are 0x80073CF0 and 0x80073CF9. The odd thing is that the Store itself updated fine yesterday (to what looks like a new colour icon) and the Microsoft To-Do app just updated a few minutes ago. I even installed the Forza Motorsport 7 demo a few days ago without any issues. However, those four apps refuse to update. Anyone know what those error codes mean or how to fix this please? Thanks. P.S. The Store troubleshooter reveals no issues.