Server slow down with Event IDs 2019 and 4211

Hi there,

We have a Windows 2003 server (SP1) that is acting as a print server.  We also have COMMVAULT installed on this server for our backups.

For about 3 days, the server runs fine without any issues.  It then starts to report multiple occurances of Event Id 4211 (WINS) with the error:

The description for Event ID ( 4211 ) in Source ( Wins ) cannot be found. The local computer may not have the necessary registry information or message DLL files to display messages from a remote computer. You may be able to use the /AUXSOURCE= flag to retrieve this description; see Help and Support for details. The following information is part of the event: .

It then reports a whole load of Event ID 2019 (SRV) with the following error:

The server was unable to allocate from the system nonpaged pool because the pool was empty.
For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

If we restart the server, the problem goes away, albeit onlt for another three days or so.

When this occurs, the server is still "available" so to speak, but all printing services do not work (even though we stop and start the print spooler), but the CPU and Processor are all fine.  We can ping the server, and it can be logged on to from its own console (but not remotely).  The pagefile usage does appear to be very high when this occurs too.

Does anyone have any ideas as to what this might be?  Should I be running a Performance Monitor over the server to narrow this down and if so, what should I be capturing?

Thanks!