1. Windows Genuine Advantage
I agree with the sentiment, if not the reasoning. All software should be free of DRM.
But to make many changes, you need to edit the Registry, and it's a tough, dangerous thing to do.
No, it's not, but if you don't know what you're doing, it's best to leave it alone. That's a life lesson we all learn as children, yes?
3. ActiveX Controls
I'm going to sound like an a**hole here, but you clearly have no idea what you're talking about. :-) ActiveX is a marketing term used to describe user interface elements built using COM. Internet Explorer is a consumer of COM components, just like many other Windows applications. For what it's worth, Microsoft has been trying to replace COM with .NET for the last ten years. Neither of those technologies is specifically tied to the "web," however. The Internet is not the end all, be all of computing.
4. User Account Control
I'm assuming you allow strangers to wander into your home because door chimes, locks, and doors themselves are cumbersome and inconvenient. And you always run as root. Regardless, you can disable UAC completely if necessary.
EDIT: Incidentally, I only rebuild my primary Windows system when I replace the motherboard (and CPU and anything else that might be upgraded as a result), which is roughly every three years. I've been working professionally with enterprise-level Windows architecture for roughly 15 years, but that's neither here nor there. Anyone with access to Wikipedia (yes, it's more accurate than you think), Microsoft's web site, or a library can sort Windows fact from Windows fiction.