Context menu items from the drop-down lists are not working. The images next to context menu items disappeared and cannot select the individual items in the list.
Windows Update (KB4487044) breaks paths containing back slashes in IE 11. Below is referenced document from Microsoft -
You can read more info on that page. Microsoft currently has it listed as a bug.
BUSINESS SERVICE INSIGHT 8.3.5
Windows 7 Service Pack 1, Windows Server 2008 R2 Service Pack 1, Windows 10
Note that the patch description for - kb4487021 applies to: Windows 10, version 1709.
Link : https://support.microsoft.com/en-in/help/4487021/windows-10-update-kb4487021
For latest updates on the specific bug keep check the Microsoft website as this is not a product bug but an Internet explorer bug.