launch IE by pressing the Windows key and R. then type iexplore in the Run box and
When IE opens up, click the gear icon in the top right corner and select Internet Options.
Click on the Programs tab and select Make Internet Explorer the default browser.
A new window will open up
Find Internet Explorer in the left panel and click on Set this program as default, then OK.
To keep IE on the taskbar, simply right click its icon in the taskbar and select Pin to Taskbar