Installing zsh and oh-my-zsh on Windows

zsh-on-windows.md

1. Install zsh from cygwin
2. Install oh-my-zsh from https://github.com/robbyrussell/oh-my-zsh . Follow the manual instructions
3. To make zsh default on ConEmu, create a task with C:\cygwin64\bin\mintty.exe /usr/bin/zsh - . Make it the defaut shell.
4. To start a zsh shell on demand, add this batch script to your path or start menu or wherever.

start C:\cygwin64\bin\mintty.exe /usr/bin/zsh -

It's amazing, I tried running the command:

sh -c "$(curl -fsSL https://raw.githubusercontent.com/robbyrussell/oh-my-zsh/master/tools/install.sh)"

But it deletes Mintty.

What should be done?

Mintty throwing below message prompt. how can I stop this annoying prompt? its happening when I am closing git bash.