How to migrate Putty settings from one PC to another?

On old machine:

1. Start > Run > "regedit" > Ok
2. Ctrl + F > Find "SimonTatham"
3. A folder will be found. Right click the folder "SimonTatham" and click Export.
4. Save this file somewhere you can find it again.
5. Copy the file to USB and insert into new machine.

On new machine:

1. Get the USB and locate the ".reg" file from the old machine you saved above
2. Double-click the ".reg" file

Restart Putty. Old settings are now transferred!