I have a brand new account and have already setup my main character login.
After attempting to login with those credentials and it not accepting my password I reset the password and it works now.
However i don't get too much further as i get an error: "Failed to initialize instance of polcore!"
I was opening NasomiXI as admin, and have no other install of ffxi to be interfering. Please help

No worries, figured it out a bit with a tip from a friend.
Scrubbed my registry a bit and gold to go