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.
Symptoms
When you download a file that has a very long file name (150 characters or more) from a website, and then you select Open on the notification bar, nothing happens. The file is not opened as expected.
Resolution
To fix this issue, 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 MS15-112: Security update for Internet Explorer: November 10, 2015 (3100773).
Status
Microsoft has confirmed that this's 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.