A new report from Nielsen/NetRatings shows that despite the launch of IE7 and Windows Vista, Microsoft's marketshare in the U.S. search market further dropped.
While Google increased its lead from 53.7% in March to 55.2% in April, Microsoft's marketshare dropped from 10.1% to 9%.
Yahoo had a small growth, from 21.8% to 21.8%.
The April results return to a familiar pattern of Google gaining ground at the expense of its chief rivals, although Microsoft had been doing a bit better in recent months. In its January earnings conference call, Microsoft executives indicated that they were not pleased with the company's search results.
AOL remained in fourth place for April, but saw its share slip to 5.4 percent from 5.8 percent in March, while Ask.com held steady in fifth place with 1.8 percent of search queries.