If you are planning a fresh Windows installation, back up the C:\eSupport folder to an external drive first. ASUS rarely provides a direct download for the Wizard utility itself once it's gone. If you'd like, I can help you with: Locating your eSupport folder if you can't find it.
The Silent Architect: Understanding the ASUS Installation Wizard asus+installation+wizard
: It lists all official software that originally shipped with your notebook, allowing you to selectively install or reinstall programs and drivers. If you are planning a fresh Windows installation,