"shut down all windows programs before installing"

ok ever since windows 95, ive noticed that on every installer, no matter what its for..
im wondering why its so recommended? lol seldom i install somthing with all the windows closed.. ha usually thers 10+ windows running in the background when i install stuff.. and ever since windows 95, never had an issue with installing anything ::)
i dunno im bored n just installin sumthin atm... saw that warning, and clicked "next" without closing anything.. as usual
so whats with it??
im wondering why its so recommended? lol seldom i install somthing with all the windows closed.. ha usually thers 10+ windows running in the background when i install stuff.. and ever since windows 95, never had an issue with installing anything ::)

i dunno im bored n just installin sumthin atm... saw that warning, and clicked "next" without closing anything.. as usual
so whats with it??