It's the same thing. If you don't have a monopoly then it's a feature, if you do have a monopoly then it's anti competitive.

I do agree that Microsoft did a whole boat load of other, really down right despicable, business practices as well. But in the MSN Messenger and Defender cases it was purely about shipping their own products preinstalled in Windows when competitors weren't included.

I guess you're right that my wording was perhaps a little too vague though. But my point was that when it comes to software bundling, Microsoft are damned if they do and damned if they don't.