NEW YORK: Microsoft will roll out the latest version of its Windows operating system at the end of July.

 The company said Monday that Windows 10 is designed with mobile computing in mind, allowing users to switch seamlessly between personal computers, tablets, smartphones and other gadgets. The operating system is intended to give apps a similar feel on all devices and comes with a new Web browser integrated with Cortana, the company's voice-activated answer to Apple's Siri.

 Microsoft Corp. says Windows 10 will be available in 190 countries as a free upgrade on July 29 for anyone currently running Windows 8.1 or 7, the two previous versions of the software.