After a recent upgrade to 11.0.768.000 I have experienced significant performance issues that were not present in previous versions.

Issues Observed:
  • While listening to Media Player and opening a web-page the media player "stutters"
  • Similar problem when streaming audio from a podcast (i.e. NPR) when opening another webpage
  • CPU (4 cores) hit 100% across all cores when opening new webpage but when I turn off ZoneAlarm and open the same page issue not observed.

The performance issue only manifested after the Upgrade - no other changes were made on system.

Zone Alarm Information:

ZoneAlarm Security Suite version: 11.0.768.000
ZoneAlarm license key: **********************
Vsmon version: 11.0.768.000
Driver version: 11.0.764.000
Antivirus engine version:
Antivirus signature DAT file version: 1125215072
AntiSpam version:

  • Intel i5 670 @ 3.47Ghz
  • 12 GB installed RAM
  • Win7 64bit