Windows Netprobe disconnects and sometimes hangs

This is a known issue on Windows Server 2008 as described by Microsoft in the following link which also contains the hotfix:

https://support.microsoft.com/en-ph/help/2715964/handle-leak-when-the-pdhenumobjects-function-is-called-in-windows-vist 

Check your Netprobe logs for the following entries:

• Failed to allocate X bytes for performance data.
• Internal error - in RegQueryValueEx
• GetEnumerator pSvc->ExecQuery failed with error code Y ()

Where:

• X is an integer
• Y is a hexadecimal value

If you see the said entries, kindly do one of the following options:

• Option 1 - Apply the hotfix.
• Option 2 - Replace the Perfmon samplers with WMI samplers.

If the said entries are not present, kindly do the following:

1. Enable the Netprobe's SAMPLING, SAMPLINGMEM, SAMPLINGFD and MEM_UTIL debug settings:
   • 
2. Save the configuration.
3. Raise a ticket (https://support.itrsgroup.com/hc/en-us) and attach the Netprobe log when the issue reoccurs.