We are running an application that uses an overlay box, sometimes called a lightbox, to popup requests or reports. On two computers, using IE 11 and Windows 8.1, this popup overlay appears very briefly then goes away. On other computers, including Windows 8.1 and Windows 7, it works fine. I am guessing that there is some IE setting that is causing this problem, but I have compared IE settings on working and non-working computers and cannot find the difference. The overlay display works fine in Chrome on all computers, so the problem is limited to IE. This application requires IE for certain functions, so just switching to Chrome is not an option.

Any ideas what setting might be causing this problem?