The theme-aware splash screens for UWP apps will similarly conform to the default app mode in Windows 10, so if light theme is turned on, users get a light-theme splash screen. The same happens when dark-theme app mode is on.
The new behavior is available to Windows Insiders in the Dev Channel who installed the Insider Preview build 20241.
Only some UWP apps currently support theme-aware splash screens, including Microsoft's Settings, Store, Windows Security, Alarms & Clock, Calculator, Maps, Voice Recorder, Groove, Movies & TV, Snip & Sketch, Microsoft ToDo, Office, Feedback Hub, and Microsoft Solitaire Collection.
Microsoft is also working on changes to the Defrag and Optimize utility, which does its job of rearranging data for more efficient retrieval automatically.
Under Optimize Drives page – found in Settings > System > Storage > Optimize Drives – there's a new 'Advanced View' checkbox. It lists all volumes including hidden volumes. It's in early development, so LeBlanc warns that users might see the checkbox but might not notice any differences after it's clicked.
Microsoft is also listing more details in the 'Current status' column when volumes are not available for defrag. Finally, it's adding support for pressing F5 to refresh.
There's a bunch of fixes in this update too, including one for touch devices like the Surface Pro X and Surface Pro 7 where scrolling and pinch to zoom weren't working properly. It's also fixed a bug causing Task Manager to crash when closing a tab in Microsoft Edge while Task Manager is running.
Microsoft is investigating several known issues with recent insider builds. Users have reported that PCs being used to train machine-learning models using Nvidia's CUDA and Microsoft's DirectML aren't working inside Windows Subsystem for Linux (WSL).