By default, virus definitions are updated automatically every hour in ZoneAlarm Extreme and ZoneAlarm Pro Antivirus +Firewall.

You can change the frequency of automatic virus definition updates, or run an update manually if necessary.

To change the frequency of automatic virus definition updates:

1. In the main menu of the ZoneAlarm software client , click Tools > Scheduled Tasks.
   The Scheduled Tasks window opens.
2. Make sure Antivirus Update is enabled.
3. Select the frequency of updates from the drop-down menu:
   • every 30 minutes
   • hourly (default)
   • every 3 hours
   • every 6 hours
   • every 12 hours
   • every 24 hours
   To see the time of the last update and the time of the next scheduled update, click the arrow to expand the Antivirus Update section.
4. Click OK.

To run a manual update:

1. In the main menu of the ZoneAlarm software client, click Update.
   The Update in progress window opens. You can close the window, while the update runs, and the update process will continue. To see the progress of the update, click View update.
2. Click Close to exit.
   Note - If the update fails, you can click Retry to run the update again.

   These are other ways to run a manual update:

   • In the MS Windows system notification area, right-click ZoneAlarm icon, and select Update Now
   • In the ANTIVIRUS & FIREWALL panel of the ZoneAlarm software client, click Update Now button in the Antivirus/Anti-Spyware section