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Microsoft is replacing the decades-old File Explorer Properties dialog in Windows 11 with a modern WinUI 3–based version, discovered in preview build resources. Leaked strings in the MicrosoftWindows.Client.FileExp package and reporting by phantomofearth and Windows Latest indicate the legacy Win32 dialog is being migrated into the modern File Explorer framework, enabling native dark mode and reducing mixed Win32/XAML rendering that causes flicker and performance issues. The overhaul is part of
Microsoft acknowledged File Explorer stuttering in Windows 11 and says it’s addressing the issue with multiple approaches beyond the controversial background preloading. Tali Roth, Windows Shell lead, said preloading critical components is only one tactic and that engineers are also optimizing startup sequences, streamlining critical code paths, removing unnecessary work and animations, reducing disk reads, and modernizing legacy dialogs with WinUI 3. These architectural fixes aim to tackle in-app delays that preloading cannot fix—like slow folder navigation, thumbnail rendering and context menus—and are rolling out to Insiders now. If combined well, Roth says smart preloading plus deeper code improvements could make Explorer faster than in Windows 10.
Microsoft issued an optional April update (KB5083631) for Windows 11 24H2/25H2 that fixes long-standing UI and performance issues: it eliminates the File Explorer dark-mode “white flash,” preserves folder view and sort preferences when third-party apps open folders, and ensures explorer.exe terminates correctly to stop background CPU use. The patch also fixes a Delivery Optimization memory leak, speeds up startup-app readiness, improves system tray reliability and Task View/taskbar stability, and resolves several Microsoft Store install error codes. Notably, the update raises the command-line FAT32 format size limit from 32 GB up to 2 TB. These fixes are currently offered to users who opt in; a wider push arrives on Patch Tuesday, May 12, 2026.
消息称 Win11 文件资源管理器属性界面将迎来现代化改造，支持深色模式
Microsoft is replacing the decades-old File Explorer Properties dialog in Windows 11 with a modern WinUI 3–based version, discovered in preview build resources. Leaked strings in the MicrosoftWindows.Client.FileExp package and reporting by phantomofearth and Windows Latest indicate the legacy Win32 dialog is being migrated into the modern File Explorer framework, enabling native dark mode and reducing mixed Win32/XAML rendering that causes flicker and performance issues. The overhaul is part of a broader 2026 effort to convert more Explorer components to WinUI 3 (address bar, search, command bar, gallery, etc.), aiming to improve stability, responsiveness, and visual consistency. The new dialog is still in preview code and may reach Windows Insider channels later this year.