Windows boss Steven Sinofsky leaves Microsoft

Leader of ubiquitous OS exits days after latest launch following 23-year career at vendor

Microsoft's Windows chief Steven Sinofsky has announced his shock departure from the company just days after the launch of the OS's latest iteration.

Sinofsky (pictured), who has spent almost a quarter of a century at the vendor, is leaving his role as Windows and Windows Live president, effective immediately. His duties will be taken on by two executives: Tami Reller adds responsibility for Microsoft's Windows business to her CMO and CFO roles, while Julie Larson-Green has been promoted to head up all Windows software and hardware engineering. The duo will report to chief executive Steve Ballmer.

"It is impossible to count the blessings I have received over my years at Microsoft," said Sinofsky. "I am humbled by the professionalism and generosity of everyone I have had the good fortune to work with at this awesome company."

"I am grateful for the many years of work that Steven has contributed to the company," added Ballmer. "To continue this success it is imperative that we continue to drive alignment across all Microsoft teams, and have more integrated and rapid development cycles for our offerings."