Windows 10 Build 9780

Windows 10 Build 9780 represents one of the earliest known versions of Microsoft’s Windows 10 operating system. Originally shared with partners through the Ecosystem Engineering Access Program (EEAP), this build provides a glimpse into the developmental stages of what would eventually become a widely used OS. While it retains many elements of Windows 8.1, including the 6.3 kernel version, it also introduces several features and changes that hint at the direction Microsoft was taking with Windows 10.

• Reintroduced Start Menu: A hybrid design combining elements from Windows 7 and Windows 8, featuring pinned shortcuts, recently used items, and a list of applications.
• Windowed Metro Apps: Metro applications can run in windowed mode via a registry tweak, though they require a minimum window size of 1301x769 pixels.
• Simplified Animations: Opening and closing windows now use a sliding and fading effect.
• Updated Default Background: The default desktop background has been swapped, with Windows 8.1’s img1 now serving as the default.
• File Explorer: A new “Home” page provides quick access to common folders and recently opened files.
• PC Settings: Additional battery-saving options, including a toggle and a slider for activation at a specific battery percentage. A “Flights” page is also present, likely for future use with Windows Insider builds.
• OneNote: The Metro version of OneNote is no longer installed by default.
• fsutil Command: Gains the ability to query ReFS (Resilient File System) volume information.
• EdgeHTML Engine: Early versions of the EdgeHTML engine are introduced via an optional feature called “Internet Explorer 11 EdgeCP Model for Config 1.5.”

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\ImmersiveShell
"ModernDesktopApps"=dword:00000001

The above allows you to run Metro apps in windowed mode.

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search
"EnableProactive"=dword:00000001

The above shows the search bar in the taskbar, even though it doesn't work.

• Start Menu Behavior: Floats in the middle of the screen if the taskbar is on the right and no apps are pinned.
• All Apps List: Text may appear black if there aren’t enough items to trigger a scrollbar.
• Auto-Colorization: Taskbar preview borders don’t update automatically when the wallpaper changes.
• Metro UI Elements: May use the login screen’s accent color on first boot, switching to the wallpaper’s color after a reboot.
• Desktop Background Page: Suffers from performance issues, with abrupt transitions instead of smooth animations.

• Content Display: Apps may show content at incorrect sizes upon startup, requiring resizing to fix alignment issues.
• Taskbar Functionality: Buttons and Aero Peek previews may not work properly.
• Title Bars: Lack application names except in specific cases like the Open dialog.
• Window Size Adaptation: Apps may not adapt well to flexible window sizes.
• Animations: Launching or closing apps may result in incomplete or abrupt animations.
• Ghost Windows: May appear in the Alt+Tab switcher after closing a Metro app, identifiable by their ApplicationFrameWindow and MetroGhostWindow classes.

• Safe Mode: Non-functional, resulting in a blank screen when attempted.

Windows 10 Build 9780 offers a rare look at the early stages of Microsoft’s development of Windows 10. While it retains many elements of Windows 8.1, it introduces several features that would become central to the new OS, such as the hybrid Start menu and windowed Metro apps. However, its numerous bugs and quirks underscore the challenges of transitioning to a new operating system. For enthusiasts and historians, this build serves as a valuable artifact, showcasing the iterative process behind one of the most widely used operating systems in the world.

And for our final part: a 1920x1080 resolution image of the desktop.