If the Get-WmiObject test fails locally or returns an "Invalid class" error, the WMI repository may be corrupted [4†L18-L22].
To troubleshoot the issue effectively, it is critical to understand the data-delivery pipeline:
If you are using a local administrator account rather than a built-in Domain Admin account, Windows UAC filters remote loopbacks, which strips administrative tokens during OMI requests. To resolve this token filtering: Open the Registry Editor ( regedit ). win32operatingsystem result not found via omi new
Because it is a core WMI class, virtually every management tool that uses WMI or OMI will query Win32_OperatingSystem as part of its discovery process. If this query fails, the tool cannot reliably determine what operating system it is communicating with.
There is rarely a single, simple explanation for this error. It usually points to an issue on the target Windows machine that is preventing WMI from functioning correctly. The Fortinet community points to connectivity or user account permission issues. The following are the most common root causes, each of which will be covered in our troubleshooting steps. If the Get-WmiObject test fails locally or returns
OMI communication depends on several specific legacy and modern management protocols. Ensure your network firewalls allow traffic from your Collector or Supervisor to the target Windows host over these ports: RPC Endpoint Mapper UDP/137: NetBIOS Name Service TCP/5985: WinRM HTTP TCP/5986: WinRM HTTPS 2. Verify User Group Memberships
The OMI client user may lack on the target Windows machine. Even if the class exists, insufficient rights cause a "not found" or "access denied" error. Because it is a core WMI class, virtually
Because there is no installed provider listening for that specific class ID, the OMI agent returns "Not Found" or an empty result set.
Based on analysis of real‑world cases from Fortinet community discussions, Microsoft OMI issue trackers, and Stack Overflow threads, the error generally stems from one of three categories:
If the salvage pass fails to clear the errors, execute a full repository reset: winmgmt /resetrepository Use code with caution. Step 3: Re-Register Corrupted System DLL and MOF Objects