I am surprised by how many people still buy products from Microsoft. ...
Newbie, I believe that you asked a honest question. I do not believe that you are a troll.
To your question: Wintel PCs are sold virtually everywhere that computers are sold. Comsumers who buy Microsoft do so because that is what ships with their computers. It is possible to install and use other operating systems. Whether they be opensource and free or commercial and fee-based, however, installing something other than Windows is the stuff of buffs, nerds, and geeks. 99.999% of consumers don't fall into these categories so Windows it is.
Third party productivity software is dominated by Microsoft because Microsoft leveraged Windows to drive the competition into the ground. It benefits from the old mantra "The job isn't done until
Lotus doesn't run."
WordPerfect used to dominate the wordprocessor market. Now,
WordPerfect receives a subsidy from Microsoft.
You can never forget this fact--most software and hardware purchases are not made by private citizens. They are made by businesses. Big businesses employ people who make these kinds of purchases. They buy the hardware and software that will keep them employed. There are many reports of businesses--both governments and private--converting from Macs to Windows. Virtually every one of these reports included the fact that the business hired a much larger staff to support its new Windows computers. Small businesses rely on salespeople to perform the duties of dedicated staff.
For a large fraction of business customers see themselves as not really having a choice. Their computer purchases must be compatible with their customers, vendors, and peers. That means buying what everyone else buys and using what everyone else uses.