Ok, I keep three different profiles on my computer for safety--Administrator which I only use to download--Business--obviously for business and money management purposes-and Personal for norm web uses like AZ. I switched to my Administator profile and fired up AZ and the Pop-up Script Error even occurs on my Admin profile. So this thing has really infiltrated my Windows setup. Normally a cookie just infects the profile that took it in since all profiles have their own Cookie Folders.
Probably arrived through that advertising Popup in the upper right hand corner of the AZHomepage with the flashing title, "Naked Women of AZBilliards Only $1.95 a Month with First Month Free!" Now how the hell was I supposed to not click on that one? And well worth it, I might add!
Different user profiles only affect what that user can and can not access on that computer when logged in and user preferences and visual setting. Doesn't have any other purpose. (Online security)