Question : "Insufficient system resources exist to complete the requested service." error when accessing network shares

Randomly a workstation will try to browse to a network drive/share and get the following error:

"Insufficient system resources exist to complete the requested service."

When this occurs, you cannot browse to the network shares with either the netbios name or the IP address, e.g.

\\10.1.1.1\share\
or \\fileserver1\share\

You can ping the IP and the NetBIOS name fine.

There doesn't appear to be anything in the event logs when it happens, no red or yellow errors in the App or System event logs coinciding with the time it happens.

Restarting explorer.exe through task manager fixes the issue.

I have a feeling it's related to memory, perhaps a memory leak? The user has the usual office applications open, i.e. Outlook, one or two Internet Explorer browsers and probably Word and Excel open. Nothing major.

Pagefile is stored on a seperate 10GB partition set to "System managed" , the OS partition C:\ has no pagefile set. OS is WinXP Pro patched to SP3. Running Symantec Endpoint Protection 11.

Anyone know what the possible cause could be?

Answer : "Insufficient system resources exist to complete the requested service." error when accessing network shares

Even If there are no memory related errors in the eventlogs, then we might still be running high on paged pool memory. try making the changes as per http://support.microsoft.com/kb/312362
PagedPoolSize dword ffffffff
PoolUsageMaximum dword 40(decimal)
Reboot and test. IF we still have issues then we might be  running out of desktop heap.
Try bumping the second value in SharedSections and check.
http://support.microsoft.com/kb/126962

HTH