[dec]

Hola,

Puedes adaptarlo a tus necesidades... si es que ves que puede serte útil algo así, claro está:

Código Delphi [-]
const
  WIN_31    = 'Win31';
  WIN_95    = 'Win95';
  WIN_98    = 'Win98';
  WIN_ME    = 'WinME';
  WIN_NT3   = 'WinNT3';
  WIN_NT4   = 'WinNT4';
  WIN_2K    = 'Win2K';
  WIN_XP    = 'WinXP';
  WIN_VISTA = 'WinVista';
  WIN_DESC  = 'WinDesconocido';
  
{ Basada en la función GetOperatingSystem() de la unidad
   "utils.pas" del proyecto GPU - http://gpu.sourceforge.net/
}
function VersionWindows(): string;
var
  OSVer: TOSVersionInfo;
  Major, Minor: cardinal;
begin
  result := WIN_DESC;
  OSVer.dwOSVersionInfoSize := SizeOf(TOSVersionInfo);
  if GetVersionEx(OSVer) then
  begin
    Major := OSVer.dwMajorVersion;
    Minor := OSVer.dwMinorVersion;
    case OSVer.dwPlatformId of
      VER_PLATFORM_WIN32S: Result := WIN_31;
      VER_PLATFORM_WIN32_WINDOWS:
      begin
        case Minor of
          0..3: result := WIN_95;
          10: result   := WIN_98;
          90: result   := WIN_ME;
        end;
      end;
      VER_PLATFORM_WIN32_NT:
      begin
        case Major of
          3: result := WIN_NT3;
          4: result := WIN_NT4;
          5:
          begin
            case Minor of
              0: result := WIN_2K;
              1: result := WIN_XP;
            end;
          end;
          6: result := WIN_VISTA;
        end;
      end;
    end;
  end;
end;