I have a feeling that M$ update and other updates use IE
Not quite, its BITS (and other bobs).
But still, I agree with your sentiment. Its a Microsoft platform, and Microsoft have a bit of a strong history of tightly nit integration between IE and Windows. So even if the official policy these days is that IE can be uninstalled in post-XP Windows, I wouldn't do it.
I also wouldn't do it, because there are still many websites out there written by incompetent, worthless, web developers who have not mastered the fact that writing a cross-platform cross-browser website is a must these days. You'll find websites that only work properly (or will only work... full stop) on IE. I'm not only taking about small-fry websites either... there are some big brands I could name (but won't) who are single browser minded.