'file could not be copied' trying to recover from a corrupted regi

I have a

'Stop: c0000218 {Registry File Failure} The registry cannot load the hive
(file): \SystemRoot\System32\Config\SOFTWARE or its log or alternate'

error, which I am trying to resolve in order to salvage data from my laptop.
I managed to enter into the Recovery Console and am in the process of typing:

md tmp
copy c:\windows\system32\config\system c:\windows\tmp\system.bak
copy c:\windows\system32\config\software c:\windows\tmp\software.bak
copy c:\windows\system32\config\sam...

'file could not be copied' trying to recover from a corrupted regi