Internet Explorer 10 is already included in Windows 8 and Windows RT. If you make a different browser your default, links will not automatically open in Internet Explorer, and you will only be able to use Internet Explorer for the desktop.
Swipe in from the right edge of the screen, and then tap or click Search (if you're using a mouse, point to the upper-right corner of the screen, and move the mouse pointer down , and then click Search).
Enter Default programs, and then tap or click Default Programs.
Tap or click the Set your default programs.
Select Internet Explorer from the list of programs.
Tap or click Set this program as default, and then tap or click OK.
You might need to repin Internet Explorer to the Start screen once you've set it as your default browser.