SBS SP1 Pre Server
aVast SBS Suite
Mix Win2K, WinXP Clients
Full AD setup with folder redirection
After having the server suite installed for a week with no issues of the actual server scanners other than replacing the proxy scanner dll to stop file corruption all of a sudden all clients were being denied access to the redirected folders. Windows reported a "security descriptor" event, users would not get their docs or desktop with logons taking forever. Eventually even proxy stopped allowing web browsing and then the administrator got locked out of console.
Had to hard crash the server
, boot into safe mode, disable all avast services, reboot and then uninstall avast. After that all access was fine as it had been prior to the problems and even prior to avast installation on the server.
I suspect an update came down which broke access however it really doesn't matter what broke it but the fact I had to take down a client for hours and hard crash a server has me very concerned about reinstalling.