Check for signatures on downloaded programs

This policy setting allows you to manage whether Internet Explorer checks for digital signatures (which identifies the publisher of signed software and verifies it hasn’t been modified or tampered with) on user computers before downloading executable programs. If you enable this policy setting Internet Explorer will check the digital signatures of executable programs and display their identities before downloading them to user computers. If you disable this policy setting Internet Explorer will not check the digital signatures of executable programs or display their identities before downloading them to user computers. If you do not configure this policy Internet Explorer will not check the digital signatures of executable programs or display their identities before downloading them to user computers.

Allow third-party browser extensions

This policy setting allows you to manage whether Internet Explorer will launch COM add-ons known as browser helper objects such as toolbars. Browser helper objects may contain flaws such as buffer overruns which impact Internet Explorer’s performance or stability. If you enable this policy setting Internet Explorer automatically launches any browser helper objects that are installed on the user’s computer. If you disable this policy setting browser helper objects do not launch. If you do not configure this policy Internet Explorer automatically launches any browser helper objects that are installed on the user’s computer.

Allow Install On Demand (Internet Explorer)

This policy setting allows you to manage whether users can automatically download and install Web components (such as fonts) that can installed by Internet Explorer Active Setup. For example if you open a Web page that requires Japanese-text display support Internet Explorer could prompt the user to download the Japanese Language Pack component if it is not already installed. If you enable this policy setting Web components such as fonts will be automatically installed as necessary. If you disable this policy setting users will be prompted when Web Components such as fonts would be downloaded. If you do not configure this policy users will be prompted when Web Components such as fonts would be downloaded.

Allow Install On Demand (except Internet Explorer)

This policy setting allows you to manage whether users can download and install self-installing program files (non-Internet Explorer components) that are registered with Internet Explorer (such as Macromedia and Java) that are required in order to view web pages as intended. If you enable this policy setting non-Internet Explorer components will be automatically installed as necessary. If you disable this policy setting users will be prompted when non-Internet Explorer components would be installed. If you do not configure this policy setting non-Internet Explorer components will be automatically installed as necessary.

Automatically check for Internet Explorer updates

This policy setting allows you to manage whether Internet Explorer checks the Internet for newer versions. When Internet Explorer is set to do this the checks occur approximately every 30 days and users are prompted to install new versions as they become available. If you enable this policy setting Internet Explorer checks the Internet for a new version approximately every 30 days and prompts the user to download new versions when they are available. If you disable this policy setting Internet Explorer does not check the Internet for new versions of the browser so does not prompt users to install them. If you do not configure this policy setting Internet Explorer does not check the Internet for new versions of the browser so does not prompt users to install them.

Use HTTP 1.1

This policy setting allows you to manage whether Internet Explorer uses HTTP 1. 1. If you enable this policy setting Internet Explorer uses HTTP 1. 1. If you disable this policy setting Internet Explorer does not use HTTP 1. 1. If you do not configure this policy setting users can configure Internet Explorer to use or not use HTTP 1. 1.

Use HTTP 1.1 through proxy connections

This policy setting allows you to manage whether Internet Explorer uses HTTP 1. 1 through proxy connections. If you enable this policy setting Internet Explorer uses HTTP 1. 1 through proxy connections. If you disable this policy setting Internet Explorer does not use HTTP 1. 1 through proxy connections. If you do not configure this policy setting users can configure Internet Explorer to use or not use HTTP 1. 1 through proxy connections.

Allow Internet Explorer to use the SPDY/3 network protocol

This policy setting determines whether Internet Explorer uses the SPDY/3 network protocol. SPDY/3 works with HTTP requests to optimize the latency of network requests through compression multiplexing and prioritization. If you enable this policy setting Internet Explorer uses the SPDY/3 network protocol. If you disable this policy setting Internet Explorer won’t use the SPDY/3 network protocol. If you don’t configure this policy setting users can turn this behavior on or off using Internet Explorer Advanced Internet Options settings. The default is on.

Turn on 64-bit tab processes when running in Enhanced Protected Mode on 64-bit versions of Windows

This policy setting determines whether Internet Explorer 11 uses 64-bit processes (for greater security) or 32-bit processes (for greater compatibility) when running in Enhanced Protected Mode on 64-bit versions of Windows. Important: Some ActiveX controls and toolbars may not be available when 64-bit processes are used. If you enable this policy setting Internet Explorer 11 will use 64-bit tab processes when running in Enhanced Protected Mode on 64-bit versions of Windows. If you disable this policy setting Internet Explorer 11 will use 32-bit tab processes when running in Enhanced Protected Mode on 64-bit versions of Windows. If you don’t configure this policy setting users can turn this feature on or off using Internet Explorer settings. This feature is turned off by default.

Do not allow ActiveX controls to run in Protected Mode when Enhanced Protected Mode is enabled

This policy setting prevents ActiveX controls from running in Protected Mode when Enhanced Protected Mode is enabled. When a user has an ActiveX control installed that is not compatible with Enhanced Protected Mode and a website attempts to load the control Internet Explorer notifies the user and gives the option to run the website in regular Protected Mode. This policy setting disables this notification and forces all websites to run in Enhanced Protected Mode. Enhanced Protected Mode provides additional protection against malicious websites by using 64-bit processes on 64-bit versions of Windows. For computers running at least Windows 8 Enhanced Protected Mode also limits the locations Internet Explorer can read from in the registry and the file system. When Enhanced Protected Mode is enabled and a user encounters a website that attempts to load an ActiveX control that is not compatible with Enhanced Protected Mode Internet Explorer notifies the user and gives the option to disable Enhanced Protected Mode for that particular website. If you enable this policy setting Internet Explorer will not give the user the option to disable Enhanced Protected Mode. All Protected Mode websites will run in Enhanced Protected Mode. If you disable or do not configure this policy setting Internet Explorer notifies users and provides an option to run websites with incompatible ActiveX controls in regular Protected Mode. This is the default behavior.