Seems to be unable to rename the DLL's

[Lusiphur]

CMD prompt run as admin

"ERROR: The system cannot find the file specified.
The system cannot find the file specified.
C:\Windows\System32\WaaSMedicSvc.dll: Access is denied.
Successfully processed 0 files; Failed processing 1 files

C:\Windows\system32>(
takeown /f C:\Windows\System32\wuaueng_BAK.dll && icacls C:\Windows\System32\wuaueng_BAK.dll /grant *S-1-1-0:F
rename C:\Windows\System32\wuaueng_BAK.dll wuaueng.dll
icacls C:\Windows\System32\wuaueng.dll /setowner "NT SERVICE\TrustedInstaller" && icacls C:\Windows\System32\wuaueng.dll /remove *S-1-1-0
)
ERROR: The system cannot find the file specified.
The system cannot find the file specified.
C:\Windows\System32\wuaueng.dll: Access is denied.
Successfully processed 0 files; Failed processing 1 files"

Executed as psexec "enable updates.bat"

[tsgrgo]

I suspect that you might have run the script twice, and you already have the DLLs restored.

Please check if these two files have already been renamed (the '_BAK' has been removed from the end of the filename).

• These two should exist:
  C:\Windows\System32\WaaSMedicSvc.dll
C:\Windows\System32\wuaueng.dll

• And these two should not exist:
  C:\Windows\System32\WaaSMedicSvc_BAK.dll
C:\Windows\System32\wuaueng_BAK.dll

If you run enable updates.bat for the first time after disable updates.bat, you should normally get:

C:\Windows\system32>(
takeown /f C:\Windows\System32\WaaSMedicSvc_BAK.dll   && icacls C:\Windows\System32\WaaSMedicSvc_BAK.dll /grant *S-1-1-0:F
 rename C:\Windows\System32\WaaSMedicSvc_BAK.dll WaaSMedicSvc.dll
 icacls C:\Windows\System32\WaaSMedicSvc.dll /setowner "NT SERVICE\TrustedInstaller"   && icacls C:\Windows\System32\WaaSMedicSvc.dll /remove *S-1-1-0
)

SUCCESS: The file (or folder): "C:\Windows\System32\WaaSMedicSvc_BAK.dll" now owned by user 
processed file: C:\Windows\System32\WaaSMedicSvc_BAK.dll
Successfully processed 1 files; Failed processing 0 files
processed file: C:\Windows\System32\WaaSMedicSvc.dll
Successfully processed 1 files; Failed processing 0 files
processed file: C:\Windows\System32\WaaSMedicSvc.dll
Successfully processed 1 files; Failed processing 0 files

But if you run it the second time when WaaSMedicSvc_BAK.dll has already been renamed to WaaSMedicSvc.dll, you will get this, which seems to be what you got:

 C:\Windows\system32>(
takeown /f C:\Windows\System32\WaaSMedicSvc_BAK.dll   && icacls C:\Windows\System32\WaaSMedicSvc_BAK.dll /grant *S-1-1-0:F
 rename C:\Windows\System32\WaaSMedicSvc_BAK.dll WaaSMedicSvc.dll
 icacls C:\Windows\System32\WaaSMedicSvc.dll /setowner "NT SERVICE\TrustedInstaller"   && icacls C:\Windows\System32\WaaSMedicSvc.dll /remove *S-1-1-0
)
ERROR: The system cannot find the file specified.
The system cannot find the file specified.
C:\Windows\System32\WaaSMedicSvc.dll: Access is denied.
Successfully processed 0 files; Failed processing 1 files