Microsoft's support page has the full list of bug fixes for this new build, which also collects all of the previous patches that have been released for the Windows 10 9926 build:
- "XBOX Live-enabled games that require sign-in do not launch, and incorrectly display the message, "To use this app, you need to sign in with the Microsoft account that was used to download it."
- The Start Menu fails to launch shortly after install
- The shortcut for the new Store (Beta) does not appear on the taskbar
- The user remains at the "Please Wait" screen when attempting to sign in with a Smart Card connected
- Virtual machines (VMs) lose connectivity to virtual hard drives (VHDs)
- Users receive Error 0x8E5E05E2 when installing apps
- The system stops responding when installing apps from the Store
- There is a delay when opening a new tab in Internet Explorer
- The system fails to resume from sleep when connected to multiple monitors with some graphics drivers
- The user is presented with the incorrect End-User License Agreement (EULA) during upgrade
- The Settings app incorrectly reports that new builds are available, which return error 0x80246017 when attempting to download
- The screen doesn't properly refresh after rotating between portrait and landscape
- Creating a virtual machine or bringing a HyperV host under management results in error 0x80200065 - "The transfer was paused because the computer is in power-saving mode. The transfer will resume when the computer wakes up."
- Windows Remote Desktop Client crashes when playing video or displaying fast moving images in a remote session
- Reliability improvements for virtual machine live migrations
- Reliability improvements to prevent some system crashes
- Reliability improvements to prevent possible data corruption
- Increased power efficiency to extend battery life"
Windows 10 preview users can now also download the first public versions of the touch-based Word, Excel and PowerPoint Windows apps.