OMG - So much Astro Turfing
Please don't water the astro-turf.
If you were genuinely interested in the anti-trust cases against Microsoft, you'd use a search engine against the terms "Microsoft antitrust" and then seek authorative third-party (non-MS, non-competitor) material, and then actually read it;
United States Microsoft Antitrust Case: 1998 - 2000 - 2002
"Welcome to this web site established for coordinated state enforcement of federal court judgments against the Microsoft Corporation for Microsoft's unlawful monopoly conduct. Here you can find information on the antitrust remedies ordered by the federal court and an on-line complaint form that may be used by the public to report suspected violations of the judgments."
European Union Microsoft Antitrust Case: 1998 - 2004 - 2007
"The web-pages referred to below provide information about the European Commission’s March 2004 Microsoft Decision, the Court of First Instance proceedings relating to that Decision, and its ongoing implementation."
"This Decision found that Microsoft had abused its dominant position in the PC operating system market"
How about that - on at least two continents:
Microsoft is a monopoly.
Microsoft acted unlawfully.
Microsoft has unclean hands.