If I recall correctly, in 1974, the Altair 8800 was born and then sold to MITS (Micro Instrument Telemetry Systems). Then in 1975, Bill Gates created the Altair BASICprogram. Then he joined forces with Paul Allen to write BASIC programs for Tandy & Apple. Then in 1977, Tandy created the TRS-80 and Apple created the Apple II. Then in 1979, IBM developed the IBM PC which was released in 1981.
The Apple O.S. was partially open source and the IBM O.S. was totally open source. Around this time, Digital Research owned the CP/M (Control Program/Microprocessor) operating system. IBM needed this O.S. to create their hardware products and Digital Research would not sell it.
So they went searching for an O.S. and found Seattle Computer Products' QDOS (Quick and Dirty Operating System). However, Bill Gates was already in talks to buy Seattle Computer Products (which he did) and renamed it Microsoft. Microsoft licensed the QDOS O.S. to IBM which in turn renamed it PC-DOS. Up to DOS v3.3, Microsoft & IBM developed this O.S. together.
At this time in history, Microsoft created MS-DOS with NO HELP from outsiders. Along with IBM and Microsoft, Bell Laboratories was busy creating an O.S. for mainframes called UNIX. Because of the fact that Windows & Unix share many commands and most directory commands, these programs are close cousins. However, Microsoft owns the license for DOS.
Regardless of what side of the fence you stand on, all of these companies have had the same pool of resources & clients to grow from. All of these companies have had the whole world eating out of the palms of their hands for many-many years. And regardless of what you hear in the news, they all have decided to create "what they have" out of their creative talents and company directors. The only difference in them all is that Microsoft has over 80% of the world's machines running MS-DOS-WINDOWS. Not because of any arm-twisting or Mafia tactics (after all I am an Italian and would know) or any other strange voodoo.
Microsoft Windows climbed to the top because the "consumers of the world" decided to buy Windows...period. Microsoft did this at the direction of Bill Gates.
As for the comments about paid postings, scare tactics and the like, they must be referring to the Mac-Antics (like their misleading T.V. ads) and the open source gang.
Finally, Why can't Microsoft sue others? if Microsoft can get sued for including music players, security software and components of their software with their O.S., why shouldn't they use the same legal tools to sue others? If you had rocks thrown at you over & over for no real reason, would you (at some point) pick a few up and toss them back! I will admit the fact that I would!
The facts are clear. All of these companies are billion dollar corporations wanting your dollars - even the open source gang. No business is a business without the money exchange. They all have products to offer and we all get to choose what works best for each of us. No one product will work best for all, but all products will require security countermeasures and regular maintenance!
Don't buy into these new age marketing tactics.

ZANGO