Microsoft Corp announced its 'Windows 10' operating system on Tuesday, skipping a number, to replace the largely unpopular Windows 8 from two years ago.

The next version of Microsoft's flagship product, which still runs the vast majority of personal computers, is aimed at recapturing the lucrative business market, which generally ignored the new-look Windows 8.

Windows 10 will be "our greatest enterprise platform ever," said Terry Myerson, Microsoft's head of operating systems, at an event in San Francisco.

He said the new Windows, long known by the project name 'Threshold' internally, represented a new type of system for the company. The name represented that leap, he said.

Myerson added that his team toyed with the idea of calling the new product 'Windows One' to emphasize the unity of all the companies' products, but noted that name had already been used.