Microsoft has introduced a background-preloading update for File Explorer in Windows 11 Insider builds to enhance application speed and smoothness. Initial tests indicate that the preloaded version opens more slowly than the standard Explorer in Windows 10, particularly on devices with limited RAM (4-8 GB), leading to sluggish performance during multitasking. Users have reported slower context menus and folder navigation, despite the intended improvements. Preloading is enabled by default in the Insider build, but Microsoft has not confirmed plans for a broader rollout. The update raises concerns about the efficiency of Windows 11's design, as the combination of older Win32 components with newer WinUI elements may compromise core performance. Users relying on File Explorer may experience delays and unresponsiveness, particularly if their systems have limited resources. Microsoft may reconsider its approach to the preloading feature in future Insider builds, and users experiencing slowdowns might consider disabling it or reducing visual effects to improve performance.