[layer8]

Just install Cygwin.

Not sure what you mean by “default shell”. The default shell on Windows is this: https://en.wikipedia.org/wiki/Windows_shell. I don’t suppose you mean booting into Bash. Windows doesn’t have any other notion of a default shell.

[faragon]

I used Cygwin for more than a decade. I prefer Git Bash (msys-based).

[hhejrkrn]

I thought msysgit was also cygein based