Procedure 'NBT' failed : WMI query 'Win32_PerfRawData_Tcpip_NBTConnection' failed (4252801)

Getting the following error:

Procedure NBT failed : WMI query Win32_PerfRawData_Tcpip_NBTConnection failed : Invalid class. [0x80041010]

Please have a look at solution 54111 for some WMI errors:
https://support.quest.com/SUPPORT/index?page=solution&id=SOL54111


If all needed Service Packs are installed and the error still persists, do the following:

Turn off the following data collection schedules for selected connection(s) to suppress Performance object... not available alarms:
- NBT
- LogicalDisk
- Network

Restart the diagnostic server service.

The resolution above will disable attempts to collect data from NBT performance object (which is unavailable) and suppress the mentioned alarm.
It is not a bug in Spotlight SQL Server Enterprise. There were no NBT-connections opened on the monitored machine and NBT performance object was unavailable.
When mentioned data collection schedules enabled, the Diagnostic Server attempts to access NBT performance object and as a result error occurs.

Further details about the NBT performance object you can find here:
http://technet.microsoft.com/en-us/library/cc738275(WS.10).aspx