Код:
set "var=HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Installer\UserData\S-1-5-18\Products\7AB5E7046046FB044ACD63458B5F481C\InstallProperties
"
set newvar=
for /f "delims=" %%a in ('2^>nul reg query "%var%"') do if not defined newvar set "newvar=%%a"
echo Это первое - %newvar%
pause
