The ONLY thing that squashed Netscape was their buggy, bloated, POS web browser. Even AOL gave up on it in favor of IE for a time.
Going a bit off topic, but I remember one of my first ISP providers was AOL, and it remained that way for about a month, the earliest I could cancel my contract. Install their software and it seemed to take over the system, had to use their browser, couldn't do nothing without AOL's permission....it was a night mare to me.
As for the topic, I think that there has been many dubious business deals over the years, which has enabled Microsoft to build up its empire, I don't think there is a monopoly, but it came very close for a while. If I recall correctly wasn't there an issue about it supplying its media player with every OS, reducing consumer choice etc.
I also used to find it annoying when I brought the first computers from places like Compaq etc. before you even started you could end up purchasing or using software which you didn't really want to, so to get a bare bones operating system you needed to uninstall all the programs which it came with.....
Ahhh anyway....I look at my computer now, and for most of my daily computing needs I use Microsoft programs, the only program I prefer over most other programs is Firefox, and paintshop for my graphic needs.