What is .WA file extension?
Addon archive created and used by Win Toolkit, a lightweight application for Windows 7 that allows you to customize a Windows installation; contains application information that can be integrated with a .WIM file to allow you to customize the programs that are installed during the Windows installation.
To integrate a WA addon file, double-click "AIO Integrator" from the Tools Manager, select "Add Addons," and choose your WA file(s).
NOTE: In order to use WA files, you have to download the Win Toolkit, which is able to integrate addons, drivers, updates, gadgets, language packs, theme packs, and registry tweaks to customize your Windows installation disk.
You can see a list of software programs here on easyfileopener.org that can open this file type so that you don’t need to search for it on the web. You can then open your file with this extension using a software listed below.