I think everyone here, including the author, has missed the entire point of the reason behind the EU's original filing, and why it continued to go against Microsoft. Yes, having a browser installed by default is in fact handy to have. No, Microsoft should NOT be forced to include other browsers... that's strangling a fair market economy.
The reason why the EU originally ruled to remove it entirely was because Microsoft made it so that you could not in fact uninstall IE. IE is so heavily integrated into windows that if you try to remove IE it will inherently "brick" the install. Then, Microsoft began using their monopoly powers to create websites that "Worked best in IE"... that is also strangling a fair market economy. The author here is correct... the EU should not be forcing Microsoft to remove IE8. What SHOULD be required is to force Microsoft to make it an option to uninstall after the fact. I never use IE except to download Chrome and Firefox before that and Netscape before that... oh and to go on the 2 websites or so that have horrid ActiveX loaded in them.
In short... the EU is wrong, and the author is wrong, and over 60% of the people commenting here are wrong. Linux and OS X give you the opportunity to remove their packaged web browsers after the fact. I'm sure if Apple was in a similar position of power as Microsoft, they would have done the same thing, so they are not innocent in this. They just HAVE to allow the removal of safari in order to please the 15% of us who don't want to have a web browser integrated into the core of the system.
The other thing is... many times in the past and present a good amount of security issues in windows arise from the integration of the browser and the rest of the system. People can remotely take over systems by exploiting bugs in IE. This rarely happens in 3rd party browsers (with the exception of plugins like java and flash). I imagine a lot of Microsoft's energy that is used on patching remote code exploitation bugs could have been spent separating and sandboxing IE (similar to how finally IE8 handles things) to prevent much of this in the first place.