AML is a piece of software that comes pre-installed, it's basically a way to launch programs etc, but it's not necessary so you can just uninstall it - do so through control panel > add/remove programs.
If you must have it then take a look at downloads on the Sony site: Sony eSupport - Electronics - Software Updates & Drivers
Quick google brought that up but if you look about the Sony site you could probably find the installer for the Vaio Launcher on its own