Microsoft are encouraging the use of online accounts with windows. Not everyone wants this. I was asked by someone without an account, who uses so-called local accounts how to get into their mail when challenged for a password.
I found this article which talks about registry settings to liberate all the “store apps”. We’ll see.
http://www.askvg.com/tip-disable-microsoft-account-sign-in-requirement-in-windows-8-1-store-apps/
Image Credit: redmondpie.com
Interstingly, I did not record if this was any use. Now marked as deprecated.