The error code 0x000006D9, known as “EPT_S_NOT_REGISTERED” in the Win32 system typically arises when theres an issue with the Endpoint Mapper (EPM) service on Windows. This service is in charge of linking the RPC (Remote Procedure Call) endpoint UUIDs (Universally Unique Identifiers) to the network locations of the RPC servers that host related services. To address this problem follow these steps;

1. Restart Your Computer; Sometimes a simple reboot can resolve system related issues, including this one.

2. Ensure Necessary Services are Running;
Press Win + R to open the Run dialog.
Type `services.msc` and press Enter to access the Services window.
Verify if these services are active;
. Remote Procedure Call (RPC)
. DCOM Server Process Launcher
. RPC Endpoint Mapper
If any of these services are inactive right click on them choose “Start,”. Set their startup type to “Automatic.”

3. Review Firewall Configurations;
Confirm that your firewall isn’t obstructing network ports, for RPC communication.
If you are using third party firewall software refer to its documentation for instructions on how to allow RPC traffic.

4. Check Registry Settings;
Sometimes incorrect registry settings can trigger this issue. However adjusting the registry requires caution as it can be risky. Remember to back up your data before making any changes.
Press the Win + R keys to open the Run dialog.
Enter `regedit` and press Enter to launch the Registry Editor.
Go to the path;
“`
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\RpcSs
“`
Verify the value of the “ObjectName” entry; it should be set as “LocalSystem.” If not double click on “ObjectName ” change it to “LocalSystem,”. Click OK.
Close the Registry Editor. Restart your computer.

5. Utilize System File Checker (SFC);
Launch Command Prompt, as an administrator.
Input `sfc /scannow` and hit Enter.
Allow the scan to finish. This command will. Fix any corrupted system files.

6. Check for Windows Updates;
Ensure that your system is kept up to date with the Windows updates. Sometimes Microsoft releases patches to address known issues like this.

7. Perform a System Restore;
If the problem began recently after installing software or updates consider using System Restore to return your system to a previous state when it was functioning correctly.

If none of these steps help resolve the issue you may want to consider reaching out for assistance, from Microsoft support or other technical communities where experts can offer customized solutions based on your specific system setup and situation.