# Fatal error was starting Putty after having saved settings > Fix the frustrating PuTTY 'No supported authentication methods available' fatal error after saving settings. Learn the quick solution by deleting a specific PuTTY registry entry. ---  **TL;DR** This article fixes PuTTY's "No supported authentication methods available" fatal error that can appear after saving default settings: delete the `Default%20Settings` entry under `HKEY_CURRENT_USER\SOFTWARE\SimonTatham\PuTTY\Sessions` in the Windows registry to reset PuTTY's defaults. A few days ago, I updated my Putty configuration to set the default font-size to 12; no more 10. Today, when starting Putty — whichever server I wanted to connect to — I got the *No supported authentication methods available* error, followed, in my case, by *(server sent: publickey, gssapi-keyex, gssapi-with-mic, keyboard-interactive)*. I only understood the origin of the problem by looking at the window caption: Putty was trying to connect to a server other than the one I wanted. Why? And, ah, ok, the last time I modified my settings I was working on that server so, the solution should come from: *how can I reset my Putty settings?* The solution has been provided by @makurison on . Simply start `regedit.exe`, search for the key `Computer\HKEY_CURRENT_USER\SOFTWARE\SimonTatham\PuTTY\Sessions` and, there, remove the entry called `Default%20Settings`. *While you're at it: [KeePass - Overriding the URL field](/blog/keepass-overriding-url) shows how to launch a PuTTY session straight from a KeePass entry, credentials included — and [Windows Terminal - Adding a SSH profile](/blog/windows-terminal-ssh-profile) does the same without PuTTY at all.* > **Tired of session/password hassles with Putty?:** > > If you're also fighting with a forgotten stored password, see [WinSCP - Retrieve a stored password](/blog/winscp-retrieve-password). Or better, switch to key-based authentication once and for all: [SSH - Launch a terminal on your session without having to authenticate yourself](/blog/linux-ssh-scp).