What’s new in Windows 10 build 10049, list of changes

Windows 10 build 10049 desktop with Project Spartan

Windows 10 Technical Preview (build 10049) is now rolling out to all those Windows Insiders in the Fast ring of updates. As most you probably noticed, Microsoft is not releasing ISO files until it releases the build into the Slow ring.

Delivering on the promise of more frequent releases, Microsoft is releasing build 10049 only several days after Windows 10 build 10041. The new build includes a few fixes, but you won’t see many significant changes. Perhaps the most important inclusion in this build is Project Spartan, as the company is including an early preview of its Internet Explorer replacement.

If you’re still wondering what’s new on build 10049 and what features are included in the sixth release of Windows 10 Technical Preview, check out the list below with all the development information included in this new build:

Internet Explorer

  • IE is replaced by Project ‘Spartan’ as the default browser

“Project Spartan”

  • “Project Spartan” is a new browser to replace Internet Explorer as the default browser
  • Edge replaces Trident as a render engine
  • Improvements to the Edge render engine
    • CSS
      • Filters
    • Multimedia
      • <img srcset>
  • You can now draw on web-pages
  • Comments can now be added to web-pages (like Office)
  • Reading Mode is now build-in for desktops
  • Reading List is now build-in
  • Cortana is now build-in


  • Alarms & Clocks
    • Alarms has been renamed to Alarms & Clocks
    • The option bar has been updated with a new design
    • The interface is now white by default
  • Calculator
    • More options are visible in the smallest screen
    • Some buttons have been put elsewhere
    • Number buttons now are shown in bold
    • The interface is now white by default
  • Sound recorder
    • The interface is now white by default

And further

  • IE is no longer a default pinned item on the taskbar and is replaced by “Project Spartan” globe icon

Source Change Windows

About the author

Mauro Huculak is a Windows How-To Expert who started Pureinfotech in 2010 as an independent online publication. He has also been a Windows Central contributor for nearly a decade. Mauro has over 14 years of experience writing comprehensive guides and creating professional videos about Windows and software, including Android and Linux. Before becoming a technology writer, he was an IT administrator for seven years. In total, Mauro has over 20 years of combined experience in technology. Throughout his career, he achieved different professional certifications from Microsoft (MSCA), Cisco (CCNP), VMware (VCP), and CompTIA (A+ and Network+), and he has been recognized as a Microsoft MVP for many years. You can follow him on X (Twitter), YouTube, LinkedIn and About.me. Email him at [email protected].