KLA11852
Security UI vulnerability in Microsoft Products (ESU)

A spoofing vulnerability was found in Microsoft Products (Extended Support Update). Malicious users can exploit this vulnerability to spoof user interface.

Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)
Windows 10 for 32-bit Systems
Windows 10 for x64-based Systems
Windows Server 2012 (Server Core installation)
Windows Server 2016 (Server Core installation)
Windows 7 for x64-based Systems Service Pack 1
Windows 8.1 for 32-bit systems
Windows Server 2008 for 32-bit Systems Service Pack 2
Windows 8.1 for x64-based systems
Windows Server 2012
Windows Server 2008 for x64-based Systems Service Pack 2
Windows Server 2016
Windows RT 8.1
Windows 10 Version 1703 for x64-based Systems
Windows Server 2012 R2 (Server Core installation)
Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1
Windows 10 Version 1511 for 32-bit Systems
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
Windows 10 Version 1511 for x64-based Systems
Windows 10 Version 1607 for 32-bit Systems
Windows 10 Version 1607 for x64-based Systems
Windows 7 for 32-bit Systems Service Pack 1
Windows Server 2008 R2 for x64-based Systems Service Pack 1
Windows 10 Version 1703 for 32-bit Systems
Windows Server 2012 R2

Install necessary updates from the KB section, that are listed in your Windows Update (Windows Update usually can be accessed from the Control Panel)