In chapter 2 (p34) we start to install yii2 into the application. The require line given in the book will not work with our original composer.json file which will need some edits.
Having used SSH a lot, I'm pretty oblivious to Windows Shell other than flushing cache and stopping a few programs from starting up.
I kind of expected WAMP to have an SSH terminal built in and did some Googling to find out how to install one. This turned out to be unnecessary. So people suggested running & php.exe from within the wamp/bin/php/php5.3.5 folder but this just opened a terminal window that didn't do anything.