The Commission imposed a fine of 561 MEUR on Microsoft for failing to comply with its legally binding commitments to offer users a browser choice screen enabling them to easily choose their preferred web browser. In 2009, the Commission had imposed the commitments on Microsoft to address the competition concerns related to the tying of Microsoft's web browser, Internet Explorer, to its dominant client PC operating system Windows. In particular, Microsoft committed to make available in the EEA a “choice screen” as of March 2010 until 2014 enabling users of the Windows operating system to choose in an informed and unbiased manner which web browser they wanted to install in addition to, or instead of, Microsoft's web browser. However, the Commission found that Microsoft failed to roll out the browser choice screen with its Windows 7 Service Pack 1 from May 2011 until July 2012. In the calculation of the fine the Commission took into account the gravity and duration of the infringement, the need to ensure a deterrent effect of the fine and, as a mitigating circumstance, the fact that Microsoft has cooperated with the Commission and provided information which helped the Commission to investigate the matter efficiently. This is the first time the Commission has imposed a fine on a company for non-compliance with a commitments decision. Source: Commission Press Release 6/3/2013