Policy
Install binaries signed by MD2 and MD4 signing technologies
This policy setting allows you to manage whether Internet Explorer 9 can install ActiveX controls and other binaries signed with MD2 and MD4 signing technologies. Internet Explorer 9 does not support MD2 and MD4 signing technologies by default, because they are not as secure as other technologies. If you enable this policy setting, Internet Explorer 9 installs binaries signed by MD2 and MD4 signing technologies. If you disable or do not configure this policy setting, Internet Explorer 9 does not install binaries signed by MD2 and MD4 signing technologies.
d75e672de7e2 IESF_ENABLE_MD2_MD4 Registry
Copy registry mappings
HKLM\Software\Policies\Microsoft\Internet Explorer\Security\ENABLE_MD2_MD4 (enabled) = 1
HKLM\Software\Policies\Microsoft\Internet Explorer\Security\ENABLE_MD2_MD4 (disabled) = 0HKCU\Software\Policies\Microsoft\Internet Explorer\Security\ENABLE_MD2_MD4 (enabled) = 1
HKCU\Software\Policies\Microsoft\Internet Explorer\Security\ENABLE_MD2_MD4 (disabled) = 0Policy notes
This policy setting allows you to manage whether Internet Explorer 9 can install ActiveX controls and other binaries signed with MD2 and MD4 signing technologies. Internet Explorer 9 does not support MD2 and MD4 signing technologies by default, because they are not as secure as other technologies. If you enable this policy setting, Internet Explorer 9 installs binaries signed by MD2 and MD4 signing technologies. If you disable or do not configure this policy setting, Internet Explorer 9 does not install binaries signed by MD2 and MD4 signing technologies.