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Batch file to determine OS version

A handy way to run different batch commands based on Windows OS version.

(I'm not sure who to attribute this to since it shows up in so many places online.)

REM Check Windows Version
ver | findstr /i "5\.0\." > nul
IF %ERRORLEVEL% EQU 0 goto ver_2000
ver | findstr /i "5\.1\." > nul
IF %ERRORLEVEL% EQU 0 goto ver_XP
ver | findstr /i "5\.2\." > nul
IF %ERRORLEVEL% EQU 0 goto ver_2003
ver | findstr /i "6\.0\." > nul
IF %ERRORLEVEL% EQU 0 goto ver_Vista
ver | findstr /i "6\.1\." > nul
IF %ERRORLEVEL% EQU 0 goto ver_Win7
goto warn_and_exit

:ver_Win7
:Run Windows 7 specific commands here
REM echo OS Version: Windows 7 (debug line)
goto end

:ver_Vista
:Run Windows Vista specific commands here
REM echo OS Version: Windows Vista (debug line)
goto end

:ver_2003
:Run Windows Server 2003 specific commands here
REM echo OS Version: Windows Server 2003 (debug line)
goto end

:ver_XP
:Run Windows XP specific commands here
REM echo OS Version: Windows XP (debug line)
goto end

:ver_2000
:Run Windows 2000 specific commands here
REM echo OS Version: Windows 2000 (debug line)
goto end

:warn_and_exit
echo Machine OS cannot be determined.

:end