Hi,
Windows Server support sending windows event log as traps via evntwin.exe.
Personally I'd prefer a more consolidated solution such as SystemEDGE (if you're a CA shop), but you can also get the results you want thus by sending the relevant event IDs as traps.
Take a look at:
Windows Server 2008 Event Log SNMP Traps | Question Driven
Once you have the trap with OID set, you can map it to an event within Spectrum.