@ECHO OFF
IF NOT "%OS%"=="Windows_NT" GOTO Syntax
IF NOT  "%~1"==""           GOTO Syntax

ECHO.
ECHO .NET Framework versions installed on this computer:
ECHO.
FOR /F "tokens=5 delims=\" %%A IN ('REG.EXE Query HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\.NETFramework ^| FINDSTR.EXE /R /E /I /C:"\\v[0-9]\.[0-9][^^\\]*" ^|^| ECHO 1\2\3\4\-none-') DO ECHO.	%%A
GOTO:EOF


:Syntax
ECHO NETFxVer.bat,  Version 1.00 for Windows 2000 or later
ECHO List installed .NET Framework versions
ECHO.
ECHO Usage:  NETFXVER.BAT
ECHO.
ECHO Written by Rob van der Woude
ECHO http://www.robvanderwoude.com