Hi,
if you have a Windows Errorcode like 0xc000021a and want to decode it to a human readable format you can use certutil.
An example
D:\> certutil -error 0xc000021a 0xc000021a (NT: 0xc000021a STATUS_SYSTEM_PROCESS_TERMINATED) -- 3221226010 (-1073741286) Error message text: {Fatal System Error} The %hs system process terminated unexpectedly with a status of 0x%08x (0x%08x 0x%08x). The system has been shut down. CertUtil: -error command completed successfully.
Michael