Newbie trying to connect to AWS instance

I am using windows with Putty.

I converted the PEM file to a PPK file using PuttyGen and have been following the instructions here: to connect to the server.

When I try to connect using root, it says to login using ubunto username.
But when I login using ubunto username, an error appears. Any advice?

Maybe a typo (either in your login or your post)? I’m pretty sure the user account is ubuntu (u’s, no o’s).

d’oh. I spelt it ubunto not ubuntu.