Windows 10 has been made officially available as a free upgrade across 190 countries, including Australia.
The new operating system is available to eligible devices, or with new PCs and tablets.
While Microsoft is describing it as the “best and most secure Windows ever”, several reports indicate many businesses will be slow to upgrade, with some questioning the relevance of the OS concept altogether.
The new operating system will be kept automatically up-to-date with innovations and security updates via online download.
“A new era of Windows starts today. From the beginning, Windows 10 has been unique - built with feedback from over five million fans, delivered as a service and offered as a free upgrade,” boasts Terry Myerson, executive vice president, Windows and Devices Group, at Microsoft Corp.
“Windows 10 delivers on our more personal computing vision, with a natural, mobile and trusted experience. Along with our partners, we’re excited to deliver the best Windows ever, which will empower people and organisations around the world to do great things,” says Myerson.
After one year, users will have to pay for the operating system or buy a new device.
Also available today are the new Windows Store and Windows Software Development Kit, which Microsoft expects will open the door to new and innovative app experiences on Windows 10.
Upgrading to Windows 10 is available for customers running a genuine Windows 7 or Windows 8.1 PC or tablet. People who reserved their upgrade to Windows 10 will be notified in waves when their upgrade is ready to be installed.
For business customers, Windows 10 is available to start deploying within their work environments, and starting August 1, organisations that have volume licensing can upgrade to Windows 10 Enterprise and Windows 10 Education.
Free upgrade programs will be available from July 29, with Windows 10 software becoming broadly available in retail stores between mid-August and September. Devices running Windows 10 will be available in some retail stores from July 29, with more devices to become available in the weeks and months ahead.
Windows 10 features: