Different rules apply, since Microsoft is a regulated, convicted monopolist. It'll be interesting to see how Google handles a similar situation, if it continues on its current market share trajectory.
Predictably, Internet search giant Google isn't appeased by the half-measures that Microsoft made in meeting its demands that it be able to replace Windows Vista's Instant Search feature with its own product. Google Chief Legal Officer David Drummond said Microsoft's changes to Vista are welcome, but that "They should be improved further to give consumers greater access to alternate desktop search providers." They didn't go into more detail, so let me explain: What Google wants are two key pieces of functionality that Microsoft won't implement. First, when a third-party search engine is installed on Vista, the Instant Search feature should be completely disabled, which is not the current plan. Second, Google should get access to the search boxes that appear in each Explorer window, and not a secondary link that Microsoft is now creating. These are valid complaints, within the confines of the changes Microsoft has agreed to make. That said, Google's overall complaint is still as baseless as ever, and Microsoft should have simply told the company to take a hike. Give them and inch and they'll take a mile, as the phrase goes. Seriously, someone needs to curb Google's power now before it's too late.