I've used zonealarm for a few months w/o problems.
But,
I just noticed that my pc performance
saddenly became extreamly very slow.
I checked cpu usage and memory usage, but it looked fine.
Even though the PC works very slow, cpu usage and memory usage were minimum.
When I installed ZA, my pc worked slower but not as slow as now.
When I click on menu items, buttons on windows, it took while to work so I need to click it a few times.
If I turn off ZA, my pc works firster.
If ZA
affects my PC's performance,
is there anything I can set on ZA to make it work better?

Besides, should I suspect I've got some virous on
my PC?