Are you really writing a GCSE article or just trolling? You started out claiming that Linux would boost PC OEM profitability, and as you've really repeatedly failed to develop any reasonable bases on which this might happen, now it's suddenly all about a "lack of competition?"
I'm sorry I had just been looking things up on the internet and had pieced together this image of Microsoft blocking every other competitor out of the OS market, and I was just looking for more of a story, something more substantial to put in my speech, you know? Oh well, I might look for a different topic...