Proliant 5500/win2k losing connections

[Steve Denger]

My 5500 running 2000 server locks one to two times daily. All users are disconnected, all sessions closed, network activity ceases. However, I never received errors in the event log. I have patched the server with all the latests service packs and fixes. This problem began after setting up several shared network printers on this server. I have since removed print services and reapplied sp's and fixes. Problem remains. Server runs perfectly otherwise. Any ideas would be appreciated.