Exchange 2007: Invalid Virus Scanner Configuration

Hello,

My SBS 2008 Exchange 2007 Server Information Store would not start this morning (after installing Rollup 10 for Exchange Server 2007 SP3).

The Event Viewer = MSExchangeIS, Invalid virus Scanner configuration (Error #9565).

I have managed to start the service, but only by DISABLING the Exchange Shield within Avast. I’m now reliant upon the Outlook Mail Shield o nthe Client computers.

Anyone have any thoughts on this?

TIA,
Stephen