Microsoft Corp. said the next version of its operating system used on most personal computers around the world will be called "Windows Vista."
The world's biggest software company stopped short of providing a launch date for the new version of Windows.
The first overhaul of the dominant computer operating system since
Windows XP five years ago, is expected to reach consumers sometime next year.
Microsoft, which developed the software under the codename "Longhorn," expects to make the test version available to developers and tech professionals by August 3, it said in a statement.
The new software is expected to sport a new graphical interface, giving it a new look and feel, and enhanced security and communications features.
"It introduces clear ways to organize and use information the way you want to use it," Microsoft said on its Web page for the new system.
"It seamlessly connects you to information, people, and devices that help you get the most out of life."
The operating system, used on around 90 percent of personal computers, accounts for around a third of Microsoft's revenue.
On Thursday, Microsoft said its fiscal fourth-quarter net earnings jumped 37.5 percent to 3.7 billion dollars, lifted by improved sales across a range of its products and a one-time tax gain.
The profit amounted to 34 cents a share. But stripping out special items including stock compensation, it amounted to 33 cents per share, two cents better than the average analyst forecast calculated by Thomson Financial/First Call.
Although its results were roughly in line with expectations, Microsoft shares quickly slipped after the results and outlook. In midday trade, the stock was down 2.6 percent at 25.75.