Answer:
Monopoly
Step-by-step explanation:
In United States vs. Microsoft Cooperation the USA government accused Microsoft of illegally maintaining its monopoly position in the PC market. It stated that Microsoft possessed monopoly for operating systems and was harming customers through its anti-competitive behavior.
At that time, Microsoft was holding more than 90% of the market share for the operating systems used on PCs. Because of this customers were lacking an alternative to Windows.
After appealing the court's decision, Microsoft decided to draft a settlement proposal. It allowed PC manufacturers to adopt non-Microsoft software.