KB5063878: Cumulative update for Windows Server, version 2025, August 2025. Critical graphics flaws patched; Active Directory issue remains open

• Switching display modes with Win + P works without pressing the shortcut twice.¹
  Fixes an issue where switching display topologies might require pressing Win + P twice.

• Internet connections after sleep are more reliable, though they might still drop intermittently.²
  Addresses intermittent internet connectivity after devices resume from sleep.

• A horizontal line no longer appears in the wrong place in some Win32 apps.³
  Fixes an uncommon ExtFloodFill issue that could place a horizontal line incorrectly in Win32 applications.

For: devices using a user profile redirected to a network VHD(X)

• The system is less likely to stop unexpectedly during normal use with a network-based user profile.⁴
  Addresses unexpected system stops and blue-screen errors when a user profile is redirected to a network VHD(X).

• Text size settings work across File Explorer and its file dialogs.⁵
  Increases support for text scaling set under Settings > Accessibility > Text size in File Explorer, File Open/Save dialogs, and copy dialogs.
• Extracting zipped files is faster, especially when they contain many small files.⁶
  Improves the performance of extracting zipped files, particularly when unzipping a large number of small files.
• The address bar shows the path after File Explorer opens.⁷
  Fixes an issue where the address bar might not show a path after opening File Explorer.

For: devices with external graphics cards connected over Thunderbolt

• Some external graphics cards connected through Thunderbolt can be detected again.⁸
  Fixes cases where external graphics cards connected over Thunderbolt might not be discoverable.

For: Hyper-V administrators

• Hyper-V Manager no longer incorrectly shows 0% CPU usage for virtual machines.⁹
  Fixes Hyper-V Manager unexpectedly displaying 0% CPU usage for virtual machines.

• Some pages with JPEG images display their content again.¹⁰
  Addresses an issue where some content pages containing JPEG images were not displaying.

For: users of the Microsoft Changjie IME for Traditional Chinese

• The Microsoft Changjie input method for Traditional Chinese works more reliably after the earlier update.¹¹
  Fixes problems that could occur with the Microsoft Changjie IME after KB5062553, including word entry or selection failures, an unresponsive spacebar or blank key, incorrect output, or a broken candidate window.

• Some network setups using Storage Spaces Direct and SMB Direct regain network setup and cluster management functions.¹²
  Addresses issues affecting Storage Spaces Direct (S2D) and Remote Direct Memory Access (RDMA) with SMB Direct in certain network configurations.

• Touch gestures can show the list of apps pinned in Start again.¹³
  Fixes the inability to use touch gestures to view the list of apps pinned in the Start menu.
• The Sign out and More options buttons remain visible with larger text.¹⁴
  Fixes the Sign out and More options buttons in the Start menu account manager not appearing with increased text size.

• Underlines beneath taskbar app icons disappear after the apps close.¹⁵
  Fixes underlines beneath app icons remaining visible after apps have closed.
• Arrow keys move in the expected direction when navigating the taskbar in Arabic and Hebrew.¹⁶
  Fixes arrow keys moving in the wrong direction after Windows key + T for Arabic and Hebrew display languages.

For: IT administrators preparing Windows 11, version 24H2 installations

• Push-button reset options work after preparing a Windows 11, version 24H2 installation with Sysprep.¹⁷
  Fixes boot file configuration not being properly updated when Windows 11, version 24H2 is installed with Windows Setup and System Preparation (Sysprep) is run afterward.

For: IT administrators preparing Windows Server 2025 installations

• Push-button reset options work after preparing a Windows Server 2025 installation with Sysprep.¹⁸
  Fixes boot file configuration not being properly updated when Windows Server 2025 is installed with Windows Setup and System Preparation (Sysprep) is run afterward.

For: users who pin packaged apps to the desktop

• Packaged app icons on the desktop no longer have a colored background plate and are easier to see.¹⁹
  The logic for apps pinned to the desktop has been updated so packaged apps no longer show an accent colored backplate.

• The component that installs Windows updates receives quality improvements.²⁰
  Includes the Windows Server 2025 servicing stack update KB5065381, build 26100.4933.