A key advantage to skipping the Windows 8.1 upgrade in favor of Windows 10 is that Windows 10 has a fully expandable Start menu. People, including technology industry pundits and columnists, complained bitterly about the elimination of the Start button and Start menu in version 8, and Microsoft's compromise of a Start button in version 8.1 apparently does not go far enough. The new, redesigned Start menu in Windows 10 is the technology giant's way of satisfying customers' needs.
Windows 10 comes with Cortana, which version 8.1 of Windows doesn't have. Cortana is the voice-powered intelligent personal assistant and knowledge navigator that Windows Phone 8 users will be acquainted with because it's a feature of the smartphone. Windows 10 has the first desktop version of the software.
Windows 10 comes with a new browser called Spartan in lieu of Internet Explorer. Many people have complained about the confusing nature of the dual Internet Explorer "personalities" in version 8.1: the Metro-style browser and the desktop version. As a result, Microsoft has developed this next generation browser, which it promises to be easier to use across media platforms and more lightweight. Microsoft hopes the browser will encourage mobile users to browse more.