Здравствуйте, akasoft, Вы писали:

Батник (check_key.bat):

@echo off
call :a
::call :a >>result_c.txt 2>&1
goto :eof

:a
ver>>result.txt
call :r HKLM\Software\Microsoft\Windows\CurrentVersion\CapabilityAccessManager
call :r HKCU\Software\Microsoft\Windows\CurrentVersion\CapabilityAccessManager
::call :r HKLM\Software\Microsoft\Windows\CurrentVersion\CapabilityAccessManager2
goto :eof

:r
set _=-
reg query %1 /ve
if %errorlevel%==0 set _=+
echo %_%%1>>result.txt
goto :eof

Результат (result.txt)

Microsoft Windows [Version 10.0.19045.3208]
+HKLM\Software\Microsoft\Windows\CurrentVersion\CapabilityAccessManager
+HKCU\Software\Microsoft\Windows\CurrentVersion\CapabilityAccessManager
-HKLM\Software\Microsoft\Windows\CurrentVersion\CapabilityAccessManager2

CapabilityAccessManager2 просто чтобы показать вывод для отсутствующего ключа.