Trend Micro issued the 1st critical patch today (November 12, 2010) for WFBS 7. The download path is:
You can also browse to it via the Trend Micro Download Center at http://downloadcenter.trendmicro.com/
Issue: The performance of some Worry-Free Business Security 7.0 servers may slow down after a few weeks.
Solution: Critical patch 1347 updates the "OfcService.exe" file of the Security Server releases unused resources to enhance system performance.
According to Trend Micro, a new patch release notification email will be sent to associated administrator accounts, and a pop-up message will appear in the Worry Free Business Security Management Console next week.