When you open a hosted MHTML (.mht) file that has embedded script resources in Internet Explorer 11, Internet Explorer 10, or Windows Internet Explorer 9, the MHTML file may be displayed incorrectly and you may receive a script error. This issue occurs if the network connection to the file location experiences latency or slowness.
Update informationTo resolve this problem, 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 March cumulative security update for Internet Explorer (MS15-018) .
This issue occurs because of a timing issue for Internet Explorer when it requests the embedded resources.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.