Warning: The retired, out-of-support Internet Explorer 11 desktop application has been permanently disabled through a Microsoft Edge update on certain versions of Windows 10. For more information, see Internet Explorer 11 desktop app retirement FAQ.

About this update

There is consensus across the industry that the RC4 cipher is no longer cryptographically secure, and therefore RC4 support is being removed with this update. With this change, Microsoft Edge and Internet Explorer 11 are aligned with the most recent versions of Google Chrome and Mozilla Firefox. For detailed information about RC4 cipher removal in Microsoft Edge and Internet Explorer 11, see RC4 will no longer be supported in Microsoft Edge and IE11. If you want to turn on RC4 support, see details in the More information section.

How to get this update

For Internet Explorer 11 in Windows 8.1 or Windows 7

Install the most recent cumulative security update for Internet Explorer. To do this, go to Microsoft Update. Additionally, see the technical information about the most recent cumulative security update for Internet Explorer. Note This update was first included in the MS16-095: Security update for Internet Explorer: August 9, 2016.  

For Internet Explorer 11 and Microsoft Edge in Windows 10

To have this change apply for Internet Explorer 11 and Microsoft Edge in Windows 10 or Windows 10 version 1511, you must install one of the following updates:

References

Learn about the terminology that Microsoft uses to describe software updates.

Need more help?

Want more options?

Explore subscription benefits, browse training courses, learn how to secure your device, and more.

Communities help you ask and answer questions, give feedback, and hear from experts with rich knowledge.