How do you determine Windows OS Version from within Login Script?

The following format within the login script / batch file will do the trick. The proper syntax for using findstr is generally published incorrectly on the internet.

Login script / batch file:

@echo off

ver | findstr /i "5\.1\." > nul
if %errorlevel% equ 0 goto winxp

ver | findstr /i "5\.2\." > nul
if %errorlevel% equ 0 goto winxp

ver | findstr /i "6\.0\." > nul
if %errorlevel% equ 0 goto winv

ver | findstr /i "6\.1\." > nul
if %errorlevel% equ 0 goto win7

:winxp
echo Windows XP
pause
goto eof

:winv
echo Windows Vista
pause
goto eof

:win7
echo Windows 7
pause
goto eof

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