I have a client running SBS 2000, they keep getting the following
error message in event viewer:

The timeout waiting for the performance data collection function
"PerfOS" in the "C:\WINNT.SBS\system32\perfos.dll" Library to finish
has expired. There may be a problem with this extensible counter or
the service it is collecting data from or the system may have been
very busy when this call was attempted.

They don't have a pop3 connector.

Any ideas?