ZA Extreme Security 13.3.052.000 will not work with WinXP Pro.
I know what you're gonna say, "Upgrade to Win8.1." I cannot afford it at this time. I installed the newest version and it won't let me connect to internet on any of my browsers; IE, Firefox, or Google Chrome. I had to restore my PC to earlier date to get my internet back. This new version is a no-go on my XP Pro desktop. Works fine on my Vista Dell laptop.