I get a similar problem with ZASS. MP3 files are partially corrupted, and when I try to run a downloaded .exe file Win7 tells me the file is not a win32 application. If I turn of ZASS and download, everything is fine. Using Firefox for downloads. More info:
ZoneAlarm version: 10.0.241.000
vsmon version: 10.0.241.000
Driver version: 10.0.217.000
Anti-virus engine version: 8.1.8.79
Anti-virus signature DAT file version: 1058699936
ZoneAlarm Browser Security: 1.5.311.0
ZoneAlarm ForceField Spyware Scanner: 1.5.53.235
ZoneAlarm ForceField Anti-Phishing Database: 1.2.104.0
ZoneAlarm ForceField Spyware Sites Database: 04.155