A.6.4 How can I create a Windows shortcut to start a particular saved session directly?
To run a PuTTY session saved under the name ‘mysession’, create a Windows shortcut that invokes PuTTY with a command line like
\path\name\to\putty.exe -load "mysession"
(Note: prior to 0.53, the syntax was @session. This is now deprecated and may be removed at some point.)