Factbox: Potential Microsoft CEOs who never were

People arrive at the launch event for Microsoft Windows 8 operating system in New York, October 25, 2012.

SEATTLE (Reuters) - Departed Windows boss Steven Sinofsky was the latest in a line of high-flying Microsoft Corp (MSFT.O) executives tipped to lead the world's largest software company at some point.

Microsoft has never anointed a successor to Steve Ballmer, who took over as CEO from co-founder Bill Gates in 2000 and shows no sign of moving on. Over the past decade, speculation has centered on a number of potential candidates, but they have all left the company.

Steven Sinofsky

The highly successful but confrontational head of the Windows unit left abruptly this week by "mutual" agreement. He has not announced a new job.

Ray Ozzie

The software guru tapped by Bill Gates to take over his role as Microsoft's big-picture thinker left to start his own project in 2010.

Stephen Elop

The head of Microsoft's Office unit, its most profitable, took the job of CEO at Finnish phone maker Nokia in 2010.

Kevin Johnson

Windows and online head went to run Juniper Networks in 2008, largely taking the blame for Microsoft's failed bid to buy Yahoo.

Jeff Raikes

Veteran sales and marketing leader and head of the Office unit left to join the Bill & Melinda Gates Foundation as CEO in 2008.

Paul Maritz

One of the key powers in the early days of Windows left in 2000, eventually becoming CEO of PC virtualization firm VMware. He recently became chief strategist at EMC.

(Reporting By Bill Rigby; editing by Andrew Hay)