||The Microsoft Case is probably the most famous antitrust trial in the history of protection of free market competition. This paper analyses the main facts, circumstances and consequences concerning the well-known case. Microsoft was accused of violating the Sherman Antitrust Act which is based upon the monopoly theory. Unfortunately, monopoly theory did not undergo as much changes as the computers in recent years did. Furthermore, the paper compares Microsoft with the monopoly theory and shows that there are significant differences. Notwithstanding this fact Microsoft is judged according to it. The justification goes through Microsoft’s history and the trial using documents issued by the Court, testimonies and special characteristics of the operating systems market to support the assertion that Microsoft did not abuse its market power. This work defends the abilities of the Invisible hand and shows that so far Microsoft has not done anything that would harm consumers. It is exactly the opposite, consumers have benefited from Microsoft’s actions.