Symptoms
When you try to log on to Internet Explorer 11, the program crashes if you click "Cancel" or "Don't Allow" in a dialog box that prompts you for your credentials or a smart card PIN.
Resolution
To fix this problem, 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 MS15-124: Security update for Internet Explorer: December 8, 2015 (MS15-124).
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
References
Learn about the terminology that Microsoft uses to describe software updates.