I also reduced my Internet Zone Security to medium and it works with the new MS Malware Protection for Windows XP.
At High in Stealth Mode I cannot access the Internet.
My daughter uses Symentec End Point Firewall Software which was installed last week for her by her company.
It was installed with their "Threatware" function permanently disabled.
No one at her company could figure out how to enable it.
Evidently, Symantec had already adjusted their firewall for the MS Malware Protection update.
It may be that we will be forced to leave Zone Alarm Firewall at Medium or make some other adjustment to the Zone Alarm Firewall to allow it to co-exist with the MS Malware Protection software.
The latter software may permanently allow MS engineers to monitor all their customer sites for malware and proactively block it everywhere if it shows up anywhere.
I'm going to leave the MS Malware Protection intact and just use Zone Alarm at a Medium Firewall.
The ZA Medium pane says that we are still protected but others can see our computers.
That may be necessary now to allow MS to protect us.
18 Months ago my PC was wiped out by malware and I was using Zone Alarm then.
It did NOT protect me.
Thus, this new MS Malware Protection software should NOT be uninstalled in my opinion.
It is a NECESSITY.
Message Edited by morey on 07-09-2008 07:47 AM