As of the moment, there is nothing up & running as a replacement to IE 11.
Tell us what Windows Operating System you have ...Windows Vista, W7, W8 or whatever.
Perhaps a silly thought on my part......You may have picked-up something of a Browser Blocker. Give a scan with the free edition of Malwarebytes; making sure you reject any offer for a trial of the premium edition and uncheck any boxes which are offering McAfee or anything else. Then report back in this thread.
https://www.malwarebytes.org/
Hans.