This week I removed Privatefirewall and installed Comodo (firewall only) because there seemed to be some conflict rendering one or both less reliable since the last two PFW updates, as Zemana couldn't even pass it's own test. Other Wilders members noticed the same thing. Although with Comodo Firewall, Zemana does respond to it's own tests but is completely oblivious to all aspects of the SpyShelter test. Even plain Comodo Firewall alerts before installing the test. Any suggestions or explanations appreciated. XP SP3!