By turning on sync, things like your desktop theme, browser settings, and passwords will appear on all your Windows 10 devices (as long as you sign in with your Microsoft account and turn on syncing in each device).
Some Windows 10 editions let you defer upgrades to your PC. When you defer upgrades, new Windows features won’t be downloaded or installed for several months. Deferring upgrades doesn’t affect security updates. Note that deferring upgrades will prevent you from getting the latest Windows features as soon as they’re available.
Why isn’t Cortana in my region or language?
Currently, Cortana is only available in the following countries/regions: China, France, Germany, Italy, Spain, United Kingdom, and United States. Cortana is available in these languages: Chinese (Simplified), English (U.K.), English (U.S.), French, Italian, German, and Spanish.
To use Cortana, all these settings must be set to the same language: