VirusBarrier X8 uses NetUpdate to check for definition and software updates.
NetUpdate can be accessed directly from your Menu Bar:
NetUpdate can also be accessed from the Intego Folder located in your Applications Folder:
You can also check for virus definition and software updates directly through VirusBarrier X8 by clicking Installed Definitions in the upper right corner of the window:
When you launch NetUpdate, you will be notified if updates are available for your software, or if your software is up to date.