I recently installed an application to view msg files outside of Outlook. It worked fine, however today when I tried to open an mht file it tried to open in this application which filed to handle it.
I decided to uninstall this program (as I no longer needed it) expecting IE to handle .mht files again. It didn't work.
Now IE opens, but instead of showing the file I get prompted to download it. I have tried multiple files, all having the same issue. These worked fine a couple of weeks ago.
I have already rebuilt the registry key [HKEY_LOCAL_MACHINE\SOFTWARE\Classes\IE.AssocFile.MHT] copying values from a known good system (although using IE 10 not 11). It didn't help.
I really want to avoid uninstalling and reinstalling, so your help would be appreciated.