A few times recently, I downloaded files and ZASS Browser Security scanned the files and said everything was ok. I saved the files to my desktop. When I went to run them however, I got the error that the files were not valid win32 applications. I turned off ZASS, re-downloaded the files and they worked fine. Any ideas what could be going on here?

ZoneAlarm Security Suite version: 10.0.250.000
vsmon version: 10.0.250.000
Driver version: 10.0.217.000
Anti-virus engine version: 8.1.8.79
Anti-virus signature DAT file version: 1062185152
ZoneAlarm Browser Security: 1.5.322.0
ZoneAlarm ForceField Spyware Scanner: 1.5.53.235
ZoneAlarm ForceField Anti-Phishing Database: 1.2.104.0
ZoneAlarm ForceField Spyware Sites Database: 04.155
Windoes 7 64 bit
IE9