I think that I just did what scares Bill Gates to death. I did it almost without thinking.
I was browsing news about the new XBox 360 services from a feed about E3, and clicked a link on the XBox website. This launched Windows Media Player and started streaming video to my laptop. Except it bogged down halfway through because there's some proprietary codec that Microsoft used. So I clicked to download the new software and approved for my machine to use it, being satisfied that it was actually from Microsoft. Three minutes later the damned thing still wouldn't play.
So I watched the exact same video on YouTube. It started two seconds after I clicked play.
As far as I'm concerned, the XBox franchise is just about the only new thing Microsoft has done right and well since Server 2003 and XP Pro.