Initially, the SNMP service that provides access to MIB, is neither installed nor configured on Windows-based workstations. To install the SNMP service, please follow the instructions provided here:
http://technet.microsoft.com/en-us/library/cc759570(WS.10).aspx
The configuration of the SNMP security properties is described here:
http://technet.microsoft.com/en-us/library/cc783571(WS.10).aspx
Description of MIB bases for Windows 2000/XP/2003/Vista/…
http://support.microsoft.com/?scid=kb%3Ben-us%3B237295&x=13&y=8
Brief list of useful OID for workstations under Windows 2000/XP/2003/Vista:
.1.3.6.1.2.1.25.1.1.0 – time the host has been running for (SystemUptime)
.1.3.6.1.2.1.25.3.3.1.2 – processor load (this is the initial OID; specific OID values for certain processes are to be looked for in the base directly; i.e. for the first processor the OID can be .1.3.6.1.2.1.25.3.3.1.2.3 , for the second one – .1.3.6.1.2.1.25.3.3.1.2.4)
.1.3.6.1.2.1.25.1.6.0 – number of running processes
.1.3.6.1.2.1.25.2.2.0 – total RAM size
.1.3.6.1.2.1.25.2.3.1.6.(1,2,3 …) – free space on drives 1,2,3, etc. in blocks.