*spiceworks

XP: netsh firewall set service REMOTEADMIN enable

Vista: 
netsh advfirewall firewall set rule group="windows management instrumentation (wmi)" new enable=yes 
netsh advfirewall firewall add rule dir=in name="DCOM" program=%systemroot%\system32\svchost.exe service=rpcss action=allow protocol=TCP localport=135 
netsh advfirewall firewall add rule dir=in name ="UnsecApp" program=%systemroot%\system32\wbem\unsecapp.exe action=allow 
netsh advfirewall firewall add rule dir=out name ="WMI_OUT" program=%systemroot%\system32\svchost.exe service=winmgmt action=allow protocol=TCP localport=any


Win 7
 c:> netsh advfirewall firewall set rule group="windows management instrumentation (wmi)" new enable=yes

and

 c:> netsh advfirewall firewall set rule group="remote administration" new enable=yes