[Georgio]

Код:

@echo off


for %%? in (
            "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Print\Printers\Fax\ChangeID"
            "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Ports\nul:"
            "HKU\S-1-5-19\Software\Microsoft\Windows NT\CurrentVersion\Devices\Отправить в OneNote 2010"
            "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Print\Printers\Отправить в OneNote 2010\ChangeID"
           ) do (
                 call :sub %%?
                )

goto :eof


:sub

 setlocal

 set "s=%~1"

 :sub_1
  for /f "tokens=1* delims=\" %%i in ("%s%") do set s=%%j& set t=%%i
  if defined s ((if defined x (set "x=%x%\%t%") else (set "x=%t%"))& goto %0_1) else (set "y=%t%")

 set "first_substring=%x%"
 set "second_substring=%y%"

 echo "%first_substring%"
 echo "%second_substring%"

 echo.
 pause
 echo.

 endlocal

 exit /b 0