This PC's built-in OpenSSH installer is broken ("Class not registered"), so this fix installs the real OpenSSH (standalone build, 5.7 MB) and sets everything up: host keys, Tailscale-only port 22, Atlas key, service. Run it in an ADMIN PowerShell.
1. EASIEST — download the .txt (browsers never block it), open in Notepad, copy everything, paste into admin PowerShell:
⬇ Download fix-ssh-v2-full.txt (copy-paste version)Open it in Notepad → Ctrl+A → Ctrl+C → in an ADMIN PowerShell right-click to paste → Enter. No file blocking, no "(1)" suffix — it always works.
2. Or the .ps1 (if your browser lets it through):
⬇ Download fix-ssh-v2.ps1Right-click → Run with PowerShell → Yes. If your browser shows "file couldn't be accessed", use option 1 instead — that's the browser blocking .ps1 files.
3. Or use the all-in-one zip (contains the .ps1 + the OpenSSH installer already):
⬇ Download fix-ssh.zip (all-in-one)Extract it, right-click fix-ssh.ps1 → Run with PowerShell → Yes.
4. Or copy/paste into admin PowerShell:
Diagnostic (only if sshd still won't start) — send the output to Atlas:
⬇ Download fix-ssh-diagnose.txtWhen it finishes you should see SSHD_STATUS=Running. Tell Atlas the output.