I thought it was that it was the browser as part of the OS which was the issue from being priveledged in performance (regardless of security concerns).

I conjecture that if the alt-universe Microsoft could have dodged that bullet via different code structuring. If there was a "HTMLReader.dll" available which handled the HTML page display rendering If Internet Explorer, its help file reader, and any other implementer of the API could use it there would be no antitrust issue because it doesn't technically priveledge their own applications. Not a lawyer but it would be interesting to know if I am right or where I went wrong.