In 2001, the United States government filed an antitrust lawsuit against Microsoft, alleging it had abused monopolistic power in bundling its Internet Explorer browser with its Windows PC operating system. The lawsuit was ultimately settled, and the settlement's effects expired in 2007, but Microsoft has been tentative with how aggressively it pushed its browsers over others on Windows since. It seems that Microsoft is ready to start ramping up the browsers wars again, though, with a new effort to dissuade people from downloading Google Chrome.