@erikvold
Disconnected: No Supported authentication methods available
I recently ran in to this error message when trying to pull or push anything from/to GitHub with TortoiseGit and PuTTY: "Disconnected: No Supported authentication methods available".
It turns out this message was a result of my lack of knowledge of PuTTY, and I simply did not have Pageant running with the ssh key for GitHub loaded.
I did some searching on Google and there wasn't much help out there that I could find, so I wanted to explain this for the next guy and make a reference to the only page that helped me, which was at GitHub: Guides: Addressing authentication problems with SSH