What does COA mean in my OS install description?

by on January 8, 2010

Q: I see installed OS’s listed as: “Microsoft Windows XP Professional pre-installed w/CoA” or “Microsoft Windows Vista Home Premium pre-installed w/COA”

What is “CoA”??

One Response to “What does COA mean in my OS install description?”
    Picked as best answer

    Probably stands for Certificate of Authenticity.


    Just means that the Windows Installs are legit and not pirated.