Trouble logging into Windows 10 PC

So I have Kodi 7.1 loaded on an Nvidia Shield and have it reading from my Windows 10 PC. Ive got some movies on my PC and other content that Kodi streams perfectly.

So like a dummy I change my login on my W10 PC from logging into the Microsoft network to logging in locally. Well, clearly I shouldnt have done that. Now I cant get Kodi to read from my PC.
When I try to access the PC with the Shield/Kodi I go through SMB shares and it asks me for a password. In fact the name of the computer is provided but the password line is red and I cant get it to accept any password that I use/have used.

Im pulling my hair out trying to get this to work. I think this is a Microsoft/Windows thing, but I have no joy in my life as these two wont talk any more.

Thoughts?