The SNMP service is required to receive TCP/IP counters. To check if SNMP is installed and running, open Control Panel and then Services, look in the List Box for the SNMP service, if it is not listed then SNMP needs to be installed. If it is listed check it has 'Started' next to it in the List Box.

For help with the SNMP service; Click the 'Help' button at the bottom of the Services dialog box, select 'Help Topics' and click on the Index tab. Find 'SNMP' in the List Box and double click on it. Now double click on 'TCP/IP Procedures Help' and then double click Installing and Configuring SNMP. You now have information on how to Install, Configure or Start/Stop the SNMP service.