Mainline release on a modern Dell/Intel laptop with all drivers installed. Same laptop runs Linux fine so unlikely hardware issue.

Updates would crap out with random errors like 80074005 - which a casual user should never see. I got it working again by stopping the update services from the console (net stop ...), deleting the cache and re-running.

The store would be running, then you'd Alt-Tab out and back again and it would be gone. Same happened with other Universal apps, OneNote in particular.

It certainly got more reliable over time, and I have tried the insider builds on a spare laptop and they're better - but the initial 10240 release was sub-par.