After the truly wretched Windows 8 and marginally less wretched Windows 8.1, Windows 10 comes as a breath of fresh air.
Windows 10 is much more usable than Wndows 8 or 8.1 and proudly offers a bundle of new features, including improved security, a new browser, and the voice-activated intelligent assistant Cortana. You might even call Windows 10 the most revolutionary version of Windows ever, mainly because it will be continually upgraded as part of Microsoft's "Windows as a service" effort.