If you have forgotten your bash user password on Windows 10, there is a way to log in as root to reset that user’s password using
First, make sure all bash windows are closed. This is important as if one bash instance is open, this may not work:
Open a Command Prompt as Administrator. You can do that by typing cmd in the Start menu and pressing
ubuntu config --default-user root
The previous command tells bash to log in as root the next time it’s started. So you can now run a rooted bash by typing
Now you can reset any user’s password by entering
Finally, exit bash, and in the elevated Command Prompt, type
ubuntu config --default-user myuser to change the default bash login to your bash user.