OS X wants me to reset my password randomly
I found the answer here: Skip Reset Password for OS X


  OS X Yosemite has a troublesome password reset screen you can access by turning your computer off and back on from the login screen. However, once you do this, there is no way out. The "Reset Password" boot wizard offers no exit without reseting your password. If you restart your Mac, you will end up right back in the wizard.


The solution is a PRAM reset: Command-Option-P-R during bootup.