There are some fallacies in there. Specifically:
Software developers cannot attempt to figure out how Windows XP Home works for any reason.
If you look at any commercial software product reverse engineering and disassembly is always prohibited. However that does not mean the above is true. Of course you can try to figure out things - just not by disassembly. Yes, Microsoft have made things deliberately obscure to thwart this, but the legalese does not even infer the above.
You agree that at any time, and at the request of “content providers” Microsoft may disable certain features on your computer, such as the ability to play your music or movie files.
That's an oversimplification too. If these DRM features were disabled, you would only be prevented from playing music or movie files protected by DRM, and then you have to agree to these conditions when you use the DRM-protected content anyway. Yes, it's anti-choice, but again, the above is incorrect.
You may not rent, lease, or lend your computer with Windows XP Home on it or otherwise make commercial use of it.
It doesn't say that at all. It only states that for "commercial hosting purposes". Of course you can rent or lease your PC, providing you're not leasing or renting web or file space from it. A ridiculous clause, nevertheless - why the hell shouldn't I be able to sell web hosting services using my own PC and software?