1/11
People walk past a display at a press conference unveiling the Microsoft Windows 8 operating system in New York City. AFP photo
Takatoshi Kojima poses with his Microsoft Corp's Windows 8 operating system outside an electronics store at the Akihabara district in Tokyo. Reuters/Toru Hanai
2/11
Takatoshi Kojima poses with his Microsoft Corp's Windows 8 operating system outside an electronics store at the Akihabara district in Tokyo. Reuters/Toru Hanai
Microsoft CEO Steve Ballmer speaks at the launch event of Windows 8 operating system in New York. Reuters/Lucas Jackson
3/11
Microsoft CEO Steve Ballmer speaks at the launch event of Windows 8 operating system in New York. Reuters/Lucas Jackson
Microsoft CEO Steve Ballmer arrives to give his presentation at the launch of Microsoft Windows 8, in New York. (AP Photo/Richard Drew)
4/11
Microsoft CEO Steve Ballmer arrives to give his presentation at the launch of Microsoft Windows 8, in New York. (AP Photo/Richard Drew)
A customer receives his Microsoft Corp's Windows 8 operating system outside an electronics store at the Akihabara district in Tokyo. Reuters/Toru Hanai
5/11
A customer receives his Microsoft Corp's Windows 8 operating system outside an electronics store at the Akihabara district in Tokyo. Reuters/Toru Hanai
Employees look on as Microsoft CEO Steve Ballmer speaks via a webcast during an event unveiling a new Microsoft Windows operating system at the company's headquarters in Redmond, Washington. (AP Photo/Elaine Thompson)
6/11
Employees look on as Microsoft CEO Steve Ballmer speaks via a webcast during an event unveiling a new Microsoft Windows operating system at the company's headquarters in Redmond, Washington. (AP Photo/Elaine Thompson)
Microsoft CEO Steve Ballmer gives his presentation at the launch of Microsoft Windows 8, in New York.(AP Photo/Richard Drew)
7/11
Microsoft CEO Steve Ballmer gives his presentation at the launch of Microsoft Windows 8, in New York.(AP Photo/Richard Drew)
A man takes pictures of a monitor during an event promoting the debut of Microsoft Corp's Windows 8 operating system at the Akihabara electronic shops district in Tokyo. Reuters/Toru Hanai
8/11
A man takes pictures of a monitor during an event promoting the debut of Microsoft Corp's Windows 8 operating system at the Akihabara electronic shops district in Tokyo. Reuters/Toru Hanai
Iain McDonald, partner director Windows Product Management for Microsoft, holds up a component piece of a Windows device during an event unveiling a new Microsoft Windows operating system at the company's headquarters in Redmond, Washington. Designed to run on both PCs and tablet computers, Windows 8 heralds the biggest change to the industry's dominant operating system in at least 17 years. (AP Photo/Elaine Thompson)
9/11
Iain McDonald, partner director Windows Product Management for Microsoft, holds up a component piece of a Windows device during an event unveiling a new Microsoft Windows operating system at the company's headquarters in Redmond, Washington. Designed to run on both PCs and tablet computers, Windows 8 heralds the biggest change to the industry's dominant operating system in at least 17 years. (AP Photo/Elaine Thompson)
Microsoft CEO Steve Ballmer walks in front of a screen of computer manufacturers after his presentation at the launch of Microsoft Windows 8, in New York. Windows 8 is the most dramatic overhaul of the personal computer market's dominant operating system in 17 years. (AP Photo/Richard Drew)
10/11
Microsoft CEO Steve Ballmer walks in front of a screen of computer manufacturers after his presentation at the launch of Microsoft Windows 8, in New York. Windows 8 is the most dramatic overhaul of the personal computer market's dominant operating system in 17 years. (AP Photo/Richard Drew)
A shop staff dressed as a maid works next to Microsoft Corp's Windows 8 operating system packaged in boxes with anime design, as Windows 8 goes on sale outside an electronics store at the Akihabara district in Tokyo.Reuters/Toru Hanai
11/11
A shop staff dressed as a maid works next to Microsoft Corp's Windows 8 operating system packaged in boxes with anime design, as Windows 8 goes on sale outside an electronics store at the Akihabara district in Tokyo.Reuters/Toru Hanai