Is this the full version of ZA that does this? I have the free version and I don't recall ZA ever catching any viruses or changing file extensions - unless it did so silently.? In Zone Alarm - under Security Settings, should the Block Internet Servers be checked? (if one is connected by cable modem?) I only have the Mail-safe protection to quarantine checked. Linda At 11:24 PM 11/26/2001, you wrote: >Zone Alarm changes the extension to .zlt or something like that so that >the dangerous executable .exe and .doc and .scr files cannot be run. The >icon is a warning, too, that Zone Alarm locked up the file. Zone Alarm >seems to catch many files before Norton has a chance to catch them.