- Improvements to general application compatibility.
- Improvements in the upgrade experience, including fixing an issue where some devices would lose data coections or touch input after upgrading to Windows 10.
- Improved the reliability of reminders.
- Improved UI for tracking data usage under Settings > Network and wireless > Data usage.
- Improved the navigation bar experience for some devices.
- Fixed an issue where some SD card readers were not recognized.
- Updated Daylight Savings in countries with Daylight Savings changes.
Keep in mind that this isn’t available to the general public just yet — however, if Microsoft’s testing shows that this build is good enough for the public, they will probably release it next Tuesday.