"Microsoft Corp.'s Kevin Johnson, who oversaw the bid to buy Yahoo! Inc., is leaving, adding to the challenges facing the software maker's Internet unit.

Johnson, who joined Microsoft in 1992, also oversaw the Windows business. The company will split Johnson's group in two, Microsoft said in a statement. He is leaving to run Juniper Networks Inc., the Wall Street Journal reported.

As one of three divisional presidents at Microsoft, Johnson took over the Windows and Online group in 2005, overseeing the unsuccessful Yahoo bid and the release of Windows Vista.
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Link:
http://www.bloomberg.com/apps/news?pid=20601087&sid=aq5f1CuTkCbM&refer=home