So perhaps Steve Ballmer was rather relieved when Mr Sinofsky talked of seeking out new opportunities.
The scuttlebutt is that Sinofsky is going to show a preview of Windows 8.
FORBES: D9: From Microsoft Windows Pres Sinofsky, A Look At Windows 8
Sinofsky says for now they calling the next generation of Windows just Windows 8.
FORBES: D9: From Microsoft Windows Pres Sinofsky, A Look At Windows 8
Steven Sinofsky, the head of Microsoft's Windows division, has left the company with immediate effect.
Mr Klein's departure was announced just months after Steven Sinofsky, the head of Windows, quit the firm.
His departure comes just months after the Steven Sinofsky, the head of Windows division, quit the firm.
Sinofsky wrote in a memo to his colleagues that the decision to leave was all his own.
FORBES: Microsoft Shares Slump On Concerns About Sinofsky's Exit
The division saw its vocal head Steven Sinofsky being ousted and replaced with two new executives.
FORBES: Microsoft Needs To Deliver Some Good News On Windows 8
Sinofsky brings out Julie Larson-Green, corporate VP for Windows, to do a demo of Windows 8.
FORBES: D9: From Microsoft Windows Pres Sinofsky, A Look At Windows 8
If Sinofsky intends to look elsewhere for employment, he may very well explore opportunities at Google and Apple.
Steve Sinofsky is probably the second most important figure at the company after the chief executive Steve Ballmer.
He added that many observers saw Mr Sinofsky as a potential successor to Steve Ballmer, Microsoft's chief executive.
Rather, Sinofsky will probably build his own software company that compliments the work of Microsoft and other tech giants.
Sinofsky might be better suited for Google, where he could help refine Android.
The Surface will "be priced like comparable tablets, " Windows Chief Steve Sinofsky said.
Sinofsky says with Windows 8 they tried to really re-imagine how it works.
FORBES: D9: From Microsoft Windows Pres Sinofsky, A Look At Windows 8
Sinofsky says they will extend Windows to a broader range of form factors.
FORBES: D9: From Microsoft Windows Pres Sinofsky, A Look At Windows 8
Sinofsky did also, of course, describe the Surface as a touch-first tablet device, but also emphasized its utility and productivity.
Sinofsky explained that "you're in this loop" of ever increasing screen size, more battery to support it and, naturally, more weight.
In a letter to all employees, published by Forbes, Mr Sinofsky set out to quell the rumours about his departure.
However, one industry watcher suggested there had been talk of an internal "war" between Mr Sinofsky and chief executive Steve Ballmer.
As Sinofsky tells it, Surface was in development for three years before its official reveal at an LA press event last June.
Sinofsky spent the last 23 years of his life working for Microsoft.
That clearly does not sound like Sinofsky, 47, is ready to retire.
FORBES: Microsoft Shares Slump On Concerns About Sinofsky's Exit
Larson-Green and Sinofsky are showing the software on running a variety of form factors, some with touch screens, and some conventional laptops.
FORBES: D9: From Microsoft Windows Pres Sinofsky, A Look At Windows 8
But, said Mr Sinofsky, Windows Phone 7 was aimed at smaller devices and the full version would be for larger tablets, slates and netbooks.
Sinofsky notes that it was important not to forget that the mouse and keyboard are just tools, that magnify the efforts of your hands.
FORBES: D9: From Microsoft Windows Pres Sinofsky, A Look At Windows 8
Basically, Sinofsky was a threat to Ballmer, so Ballmer eliminated him.
As we enter this new era, and with the successful launch of Windows 8 and Surface behind us, Steven Sinofsky has decided to leave the company.
FORBES: Microsoft Shocker: Windows President Steven Sinofsky Out (Updated)
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