Bing, the form of Microsoft, lost users in the U.S.

The market share of Microsoft's browser Bing fell in September, marking his first setback since four months ago, when the software giant is renewed leadership to fight Google.
According to a report by research firm StatCounter, the market share of Bing, Microsoft, fell more than 1 percent in September.
Google's participation in the U.S. search market rose in September to 80.08 percent, up from 77.83 in August.
The report shows the first reduction since the introduction of Bing in June.
In September, a separate report from comScore indicated that Bing's market share had grown in the United States in August to 9.3 percent, compared with 8.9 percent a month ago.

Aodhan Cullen StatCounter CEO, said in a statement that Bing has slowed since mid-August.
Yahoo also lost market share, according to the study, from 10.5 percent to 9.4 percent.