Unpacks and installs (in standalone mode) the most recent, manually downloaded Vivaldi Windows installer from your Downloads folder, into a version numbered sub-folder of your desktop

uv.bat

@ECHO OFF

SET INSTALLPATH=%HOMEPATH%\Desktop\Vivaldi-Builds
SET DOWNLOADPATH=%HOMEPATH%\Downloads

FOR /F %%i IN ('dir /b /t:w /o-d "%DOWNLOADPATH%"\Vivaldi*.exe') DO (
    SET PKG=%%i
    GOTO :CONTINUE
)
ECHO No Vivaldi installers in Downloads
pause
GOTO :END

:CONTINUE
SET VER=%PKG:Vivaldi.=%
SET VER=%VER:.x64=%
SET VER=%VER:.exe=%

IF EXIST "%INSTALLPATH%\%VER%" (
  ECHO Vivaldi %VER% is already installed
  pause
  GOTO :END
)

ECHO Installing Vivaldi %VER%
"%DOWNLOADPATH%\%PKG%" --vivaldi --vivaldi-standalone --vivaldi-update --vivaldi-install-dir="%INSTALLPATH%\%VER%"
:END