Recently we have upgraded 5.1sp7 servers to 6.5sp3a. All the upgrades have gone fine. EDIR I've applied the NSS and server.exe updates also.

Only problem is that files on the server (MS excel and word) over 2mb take maybe 20 secs to open. Sometimes this crashes the PC. There doesn't appear to be any comms problems and the servers sit at 0-1% util.
Any ideas what I could look for. Oh yeah I've disabled Oplocks.