After installing Windows 10 on my Macbook via Bootcamp, I've "Reset this PC" while in Windows, and now I'm no longer able to reboot into macOS.
I'm not concerned with losing any files on this computer (in either OS), but I would like to reinstall macOS, and then reinstall Windows via Bootcamp.
How would one go about this?
41 Answer
The most likely explanation is that the reset has deleted the specific Boot Camp drivers which enable Windows to see the APFS file structure & make changes to the startup disk.
Holding Opt at boot ought to let you switch to macOS from where you should be able to run the Boot Camp Assistant & download the drivers again.
See Apple KB - Download and install Windows support software on your Mac for further details