Along with fixing many code-based vulnerabilities, the October 2025 Windows updates also change how File Explorer handles files downloaded from the internet. The change affects the file management tool’s Preview Pane, which lets users see the contents of a file without opening it. From now on, the preview feature will be disabled for: Files marked with Mark of the Web (MotW) (i.e., files that have been downloaded from the internet) and for Files viewed on … More
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