Microsoft, which is based in Redmond, Wash., saw lackluster demand when Windows 8 and Windows Phone 8 came out in October 2012.
Windows 8 was supposed to be Microsoft's answer to the growing popularity of touch-screen devices such as smartphones and tablets. Instead, research firm IDC blamed Windows 8 for accelerating a decline in global PC shipments, which fell 14 percent in the first three months of 2013, the first full quarter with Windows 8.
Designed as a single system to unify tablets, laptops and desktop PCs, Windows 8 emphasizes touch-screen controls and sports a full-page home screen that is more common on mobile gadgets than traditional computers. Many consumers, however, hate that approach on laptops and desktops.
Last October, Microsoft issued a free update to address some of the gripes. Now, people can run more than two apps side by side. The built-in browser lets people open more than 10 tabs without automatically closing older ones. Windows 8.1 also introduced new features, including a universal search function to help users find files stored on their computers along with Web content on the Internet.
At the time of the release, Microsoft promised to issue new features regularly.
The latest update will do just that. Microsoft has said the company is standing by its decision to embrace touch controls, while acknowledging that many of the remaining Windows gripes have come from people who use non-touch devices.
Meanwhile, Windows Phone 8 came out with a thud some 17 months ago. One of its biggest drawbacks has been a lack of apps available for the system, compared with Apple's iOS and Google's Android. Microsoft is starting to catch up on that front. It has also updated Windows Phone 8 three times since its release to add features. The upcoming update is poised to be the biggest of them all and might get a new name, Windows Phone 8.1.
The release comes as Microsoft prepares to buy Nokia's phone business and patent rights in a 5.4 billion euro ($7.4 billion) deal. The transaction should be completed in the next few weeks, pending regulatory approval in Asia. The deal already has approval in the U.S. and Europe.
