Event ID - 256

Event Id256
SourceWDSPXE
DescriptionAn error occurred while trying to open the registry key HKEY_LOCAL_MACHINE\%1\%2 for provider %3. This can happen if the provider was not registered properly.

Error Information: %4
Event InformationAccording to Microsoft :
Cause :
This event is logged when an error occurred while trying to open the registry key.
Resolution :
Confirm the permissions and registered providers
To resolve this issue, do the following in the specified order:
a)Confirm that the registry data and permissions are correct.
b)Confirm that the providers are registered.
Caution:
Incorrectly editing the registry might severely damage your system. Before making changes to the registry, you should back up any valued data.
To perform this procedure, you must either be a member of the local Administrators group or have been delegated the appropriate authority.
Confirm that the registry data and permissions are correct
To confirm the registry data and permissions:
1.Open Registry Editor. (ClickStart, typeregedit in theStart Search box, and then press ENTER.)
2.Ensure that theWDSPXE registry key exists at the following location: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WDSServer\Providers.
3.If the key exists at the specified location, ensure that the SYSTEM account used by WDSPXE has permission to read from the registry. To do this, right-click the WDSServer node, click Permissions, click SYSTEM, and then make sure that Full Control is selected.
4.IfWDSPXE is not present or is corrupt, you will need to reinitialize the server. To do this, open the Command Prompt window, runwdsutil /uninitialize-server, and then runwdsutil /initialize-server /reminst:.
If the data and permissions are correct but the issue persists, use the following procedure to confirm that your providers are registered.
Confirm that the providers are registered
To confirm that the providers are registered:
1.Open theCommand Prompt window.
2.At the command prompt, runwdsutil /get-server /show:config.
3.Confirm that this command returns the correct list of registered providers.
a)If you are using the default PXE provider, this list will contain only BINLSVC.
b)If your custom providers are not registered, you will need to reregister your custom provider.
Verify :
To verify that the providers are working correctly:
1.Open theCommand Prompt window.
2)At the command prompt, runwdsutil /get-server /show:config, and ensure that the expected providers are listed in the output.
3)Open Event Viewer. (ClickStart, typeEvent Viewer in theStart Search box, and then press ENTER).
4.In the left pane, expand Custom Views, expandServer Roles, and then clickWindows Deployment Services.
5.Click the Date and Time column heading to sort the events based on time and date.
Reference LinksEvent ID 256 from Source WDSPXE

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