yeah i was happily using ZA 4.5 Pro and on the day that ZA 5.0 was released i upgraded. That's when my new iXPS got its first of many blue screens. Even with the ZA 5.0 antivirus monitoring function turned off (by the way who is the idiot at ZA that came up with that retarded feature?), i have a feeling that ZA 5.0 does not play nice with any anitivirus programs out there.
I also noticed a major memory leak in ZA 5.0 in which when i first start the program, the memory usage is much lower than ZA 4.5, however after going to work and coming back 10 hours later, i see that the memory usage had ballooned to the point where my cpu was being locked at 100% and ram usage had gone up into the 100K range (keep in mind i have a linksys router/firewall at home as well so i know my ZA is not working that hard keeping out intruders- nothing gets past my router), and i am forced to restart ZA.
Overall, i'm annoyed with ZA, they seem to be heading down the norton route, just bloating their basic firewall application with useless, unnecessary features, it's just turning into one big piece of bloatware.
I've since uninstalled it and installed Outpost Firewall and have not looked back. Just pissed that i blew some $ on ZA, maybe i'll try to get that money back. Outpost is not as user friendly as ZA, but its only because it allows you much great freedom and flexibility with its rules based firewall system as opposed to ZA's application based firewall system. Yeah yeah, ZA does allow you to create simple rules, but Outpost has a pretty robust rules based system. In either case, outpost works like a charm, and they are giving me 50% off to go to them from another vendor like ZA

in any case, back on track, DO NOT INSTALL ZA 5.0
however, Zone Labs is supposed to be coming out with a patched version this week for ZA 5.0, but i won't be made a chump twice