Eg for IE11 installed (no UDF version):   #include <IE.au3> #include <Process.au3> Local $regValue = "0x2AF8" ; IE11 edge mode: 11001 (0x2AF9) ; IE11: 11000 (0x2AF8) ; IE10: 10001 (0x2711) ; IE10: 10000 (0x02710) ; IE 9: 9999 (0x270F) ; IE 9: 9000 (0x2328) ; IE 8: 8888 (0x22B8) ; IE 8: 8000 (0x1F40) ; IE 7: 7000 (0x1B58) RegWrite("HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main\FeatureControl\FEA