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
KB4486565 applies to: Windows 7 Service Pack 1, Windows Server 2008 R2 Service Pack 1
Please let the client choose the right patch to fix the issue for this known issue
"After installing this update, Internet Explorer may fail to load images with a backslash (\) in their relative source path."
Note: This issue is resolved in KB4486565 for client specific windows 7 environment.