Windows 10 IoT Long-Term Servicing Channel (LTSC) (all versions).

Windows 7 Extended Security Updates (ESU).

While this does mean that all current supported Windows 10 versions are at risk, the following versions are not affected: On June 15, only Windows 10 20H2 and higher is affected and can potentially get their IE11 disabled with an update. Not all Windows versions are equal in this either. Note: this may be applied at any time after June 15, 2022. We will assess the appropriate time to redirect users and roll out the Windows update based on several factors. Additionally, the IE11 desktop app will be permanently disabled as part of a future Windows Cumulative Update. The IE11 desktop app will be progressively redirected to Microsoft Edge over several months. Microsoft will gradually transition users from the unsupported IE11 desktop app to Microsoft Edge. Microsoft themselves lists the following in their FAQ:

June 15 is the starting date for Microsoft to start forcing the transition away from Internet Explorer 11. Let's try and untangle the Internet Explorer 11 EOL spaghetti.

While it sounds definitive, there is still a long road ahead before Internet Explorer is really gone, with many complexities included. Internet Explorer 11 will be entering its end-of-life phase on June 15, 2022.

Install internet explorer 11