I've got a DC built on Windows 2008 Server which is also acting as a fileserver for the network. This server is protected with KAV for Windows Server Enterprise Edition (latest release). At random times throughout the day, the network will freeze up, causing all clients to lose connections to opened files from this server. Anyone attempting to login to the domain will also freeze up until it unfreezes. The freezes will usually last anywhere from 1 to 5 minutes. It doesn't seem to be a hardware issue because the remote Admin Kits that are connected never lose connection as this happens. The server never freezes up, and can access the network and internet just fine when this happens.

I've been working with Microsoft on the matter because it seemed to be a Server 2008 issue, but they suggest it is KAV Workstation or Fileserver. They are still looking into it though. My previous server had KAV for Windows Server installed and the clients have KAV for Windows Workstation (all latest release), and we never had these issues before. The only things that have changed since things were working fine... 1.) New Server 2.) New Server OS (W2K8) 3.) KAVFSEE.

I can't reproduce the issue... it just happens randomly. Sometimes multiple times within the hour, sometimes a few hours before it happens again.

The question I have is... are there any known issues with KAV for Windows Server Enterprise Edition that would cause these network freeze ups? If so, is there a fix that will prevent it? We've never gone a whole day without the issue occurring, and I'm doing some testing right now to determine if it is KAV. I'll post back with any findings. Any thoughts would be appreciated.

Thanks