[orerviche]

PS: What browsers should they include? Opera, Safari, Firefox, Flock, K-Meleon, Mozilla, Chrome? In addition to being a confusing and complicating UI for most users who don't know or care about their browsers, it's an arbitrary list. There are hundreds of different browsers to install, who decides what is included or not?

I think you're greatly exaggerating how tough it would be for Microsoft to do this. The list need not be arbitrary.

Fact is that since Microsoft has a monopoly in the OS, it is forbidden from using normal competitive business practices in adjacent markets. However, Microsoft is getting all pissy about it and thereby inconveniencing its customers.