Код:

IF EXIST "%SYSTEMDRIVE%\PROGRAM FILES (x86)" (SET "key=HKLM\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run") ELSE SET "key=HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run"
FOR /F "tokens=1,2*" %%i IN ('reg query "%key%" /s^|find "REG_SZ"') do if "%%i"=="AVP" SET "new=%%k"