Overview
- A leak and Windows Insider preview builds published on Wednesday showed a new, pared‑down File Explorer properties dialog and an option to enable a modern Run dialog for testing.
- Microsoft has confirmed a program to replace legacy dialog boxes with interfaces built entirely on WinUI 3 to standardize styling and speed up UI loading.
- Early screenshots show fewer tabs and less detail in the prototype properties view with full dark‑mode styling, suggesting features may be reduced or restored as development continues.
- Engineers and reporters warn the rework carries real compatibility risk because many third‑party tools and drivers rely on old dialog APIs and integration points.
- The changes remain in preview with no firm ship date; observers say the work could land as part of the larger 26H2 feature update in autumn 2026 but that outcome is unconfirmed.