I cannot install Microsoft security essential for window xp, because of the window genuine
advantage error. When I using MGAdiag.exe to check my window xp it say product key invalid.
Actually I already have valid licensed for each computer. I don't know what's wrong? Is I need to
update the product key using update tools and install MSE? or just solve the window genuine
advantage error and ignore product key to install MSE? Is anyone have an idea? Thanks