Software giant Microsoft on Tuesday unveiled Windows 7, saying its latest operating system won't be as annoying.

At the company' Professional Developers Conference here, Microsoft said the new version will not have the rampant notifications that have irked many users of Windows Vista.

People can choose to see fewer alerts and warnings from their computers in the new Windows 7, said the company, adding that people will be able to test out the next version of Windows early next year.

The design of Windows 7 will make it easier for people to switch between open windows, files and applications.

It also is supposed to give PC users faster access to recently used files, making home networking more automatic, according to the company.

And overall, the version is faster and can run on less-powerful computers, said the company.

Windows 7, the successor to Windows Vista, is scheduled to premiere in early 2010.

Microsoft expects that the new product would eliminate some of the problems that hampered Vista's premiere two years ago and continue to define the operating system's reputation.

Users have complained that the Vista system requires much more memory than its predecessor Windows XP and fails to run some applications.

Many corporate users even reportedly asked to have their computers downgraded to XP.