Already tried. Here is what I tried one week after the 10166 build was released :
- Flash and update from GDR3 to 8.1 (FW 15.3.2)
- Update to build 10166
- Hard reset from settings
-- No settings, no store
- Hard reset using hardware method (keys combination at boot)
-- No settings, no store
- Hard reset using hardware method
-- No settings, no store
Fine, let's go back to 8.1 :
- Flash and update from GDR3 to 8.1 (FW 15.3.2)
- Update to build 10166
- After a 2 days on it, issues appear with the Groove Music application
- Hard reset from settings
-- No settings, no store
- One more using hardware method ?
-- No settings, no store
8.1 it is ! 8D
As i said, I have the same problem with build 10512.
All through the above processes described above I (not every time) put the phone (while reseting) in the freezer because it was very hot. I, sometimes, ended up with a few more applications installed but I was still missing the settings and the store.
Each time during the reseting process, the progress bar stops at ~1/4.Then the phone reboot and I get the Welcome screen...
One thing I haven't tried is reseting first using the hardware method first. I will give it a try later (depends on how buggy is the build after the update on my Ativ S).