IE Follows Windows OS Versions and Support Lifecycle In addition, compatibility issues may arise with new devices (such as users' personal devices) that come with a version of IE not supported by the organization. Application compatibility can affect when an organization can deploy a new version of IE or a version of the Windows OS that includes a new version of IE. IE releases are relevant to organizations because many internal Web applications are written to support a particular IE version. Internet Explorer (IE) is Microsoft's Web browser for Windows (including Windows RT), Windows Server, Windows Phone, and Xbox.