Does Surface Duo run Windows?

Yes, it doesn’t! All Surface Duo models shipped with Android 10. Here is the complete list of the software features available on Surface Duo:

• Microsoft built-in applications:
  • Microsoft Office: Word, Excel, PowerPoint, Office Lens, PDF Reader, and more
  • Microsoft Outlook
  • Microsoft Teams
  • Microsoft OneDrive
  • Microsoft Edge
  • Microsoft OneNote
  • Microsoft To Do
  • Microsoft News
  • Microsoft Authenticator
  • Microsoft Bing Search
  • Intune Company Portal
  • LinkedIn
  • Microsoft Solitaire Collection
  • Surface Audio
• Microsoft Surface Duo UI core features:
  • Dual screen windowing
  • Adaptive modes
  • App Groups
  • Microsoft 365 Feed
  • Dynamic dock
  • Universal Search
  • Adaptive Camera
  • Microsoft SwiftKey Adaptive Keyboard
  • Your Phone Companion – Link to Windows
• Other preinstalled apps:
  • Google Search
  • Google Assistant
  • Google Calendar
  • Google Drive
  • Google Duo
  • Google Photos
  • Google Play Movies & TV
  • Google Play Store
  • Google Maps
  • Chrome
  • Gmail
  • YouTube
  • YouTube Music
  • Contacts
  • Messages
  • Phone
  • Files
  • Clock
  • Calculator
  • Sound recorder
  • Spotify (Unlocked)
  • HBO MAX (AT&T)
  • AT&T TV (AT&T)
  • My AT&T (AT&T)
  • Call Protect (AT&T)
  • Amazon Shopping (AT&T)
  • NBA (AT&T)