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?”
  1.  
    Picked as best answer

    Probably stands for Certificate of Authenticity.

    http://www.microsoft.com/howtotell/content.aspx?pg=coa&displaylang=en

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