Since installing the latest update of the toolbar it has vanished and become just an empty grey space in my IE9 toolbars area. And it is no longer checking downloads either. rebooting didn't fix it. Neither has disabling and re enabling it.

I am using Vista with all the SPs installed, and an Acer Aspire 6920 notebook. I use Avira free antivirus. Which incidentally hates ZA and insists that I uninstall it..... When I installed Avira free 2012 it listed ZA as in incompatible software but didn't noticeably break the toolbar or firewall at that time so I don't think that's necessarily anything to do with the sudden update failure of the toolbar.