A few days ago, I migrated a small network with 6 pc's and 1 SBS 2003 Premium server (multihomed with ISA installed) from Symantec antivirus to Eset Nod32. There was no antivirus installed on the server so I installed Eset File Security on it. The client PC's have the ISA firewall client installed. Everything seemed to run perfectly after the install. However, 2 days later, the client PC's were unable to connect to the server - they were unable to pick up an IP address. As I was not on-site, I logged on remotely to the server but could'nt find anything obvious. The only new errors in the Application event log was that Sharepoint was unable to connect to the database (possibly indicating a network issue). I was able to ping a printer with a static ip address indicating that the network itself was ok. I restarted the server and everything seemed ok. However, same problem occured again this evening (server was rebooted yesterday morning) so I got them to reboot the server again which seemed to get the network back. As a result, I am expecting a call again on Monday morning with the same problem. It looks like I will have to remove the antivirus from the server at least as this is the only change that was made to the server. Has anyone else seen this type of issue with File Security?