In Event Viewer, "Service Control Manager" event 7000. The RpcXdr service failed to start due to the following error: The filename, directory name, or volume label syntax is incorrect.
In Device Manager, under Non-Plug and Play Drivers. The device is not present, is not working properly, or does not have all its drivers installed. (Code 24).
This has been working for years, the rpcxdr.sys file is still in the location the driver files point to. It's C:\WINDOWS\system32\drivers\RpcXdr.sys and has not been modified.