Ideally, IE8 should be your minimum. There's a large contingent of web users still on Windows XP and IE9+ is not available for it. XP is in extended support u

Ideally, IE8 should be your minimum. There's a large contingent of web users still on Windows XP and IE9+ is not available for it. XP is in extended support until 2014-08-14 & yes, I'm counting down the days.