When you open and close a Modal Dialog window from an ATL application in Internet Explorer 11 on a under Windows 10-based system, its Graphics Device Interface (GDI) objects are not released correctly. This triggers a memory leak.
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 MS16-095: Security update for Internet Explorer: August 9, 2016.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Learn about the terminology that Microsoft uses to describe software updates.