Accountsd asking you often…
Just open the "Keychain Access", click right on the "login" keychain in the sidebar, select "Change settings for Keychain "login"" and unselect both options "Lock after ..." and "Lock when sleeping". – Tom Kraina Sep 8 '16 at 10:55
But it sounds like you may need this,,,
1. Start up from macOS Recovery
To start up from macOS Recovery, turn on your Mac and immediately press and hold one of the following combinations on your keyboard. Command-R is generally recommended, especially if you never installed macOS Sierra 10.12.4 or later.
Command (⌘)-R Install the latest macOS that was installed on your Mac.