I went to ADMIN mode and did a manual MS update.
I found out I missed out on SP3.
So I spent half of yesterday and all night to update MS Windows.
Then clean uninstall ZA with /clean /rmlicense... and deleting remaining files and registries.
Then install and configure ZA (I must have uninstall&install ZA more than half a dozen times over the past 48 hours already!)
DEFRAG (Did a number of that too.)
Finally, I realize a couple things about my computer's current operating condition:
1.) It does not work as well with PC Tools Spyware Doctor w/ AV.
2.) ZA-AV update doesn't work after Spyware Doctor is on.
This never happened to me before. ZA and Spyware Doctor worked well together for the past 6+ months, since Spyware Doctor's last major upgrade version. They never competed for CPU usage. Now I don't know why Spyware Doctor takes over ZA in speed. And now, ZA has that SLOW ADDING PROGRAM/WEBSITE thing I mentioned in the other thread posted earlier this week.