The issue focused on Microsoft's Internet Explorer browser and Windows Vista Internet Explorer software. Google Chrome was included as well. The browsers had worked flawlessly until Microsoft pushed out IE11 in October 2012. Microsoft replaced Internet Explorer 11 with Internet Explorer 12. Microsoft argued that Microsoft Edge could handle websites faster than Chrome did. Microsoft stated that websites running IE11 needed to upgrade their servers or browsers because Microsoft Edge would replace Internet Explorer 11 automatically if websites updated their servers or browsers. Microsoft explained that websites using Chrome must download updates themselves