This is a recipe for setting up pageant.exe on windows to allow ssh login without having to type in the password every time. Mainly for my own notes.
Run pageant. Take the default options and move your mouse around till your key is generated.
Put in a passphrase and save the private key somewhere private. Save the public key.
Login to the remote host using putty.
Paste in the stuff from puttygen, the part that says "Public key for pasting into…"
Close puttygen. Run pageant.exe. A little terminal with a hat icon appears in your windows task bar area. Right click it. Select add key and add in your private key that you had saved earlier. It'll ask for a password, type it in.
That's it, you're done. Now you can putty to your remote host and it won't ask you for a password. Particularly useful for things like winscp, svn+ssh, etc.