How to Enable Preview of .LOG Files in File Explorer

By default, the preview capability exists for most text-based files in File Explorer. However, for some file types, such as .log or .py, a preview may not be generated by default and you see the message “No preview available” in the preview pane in File Explorer.

You can enable preview of such files (.log and .py) in the preview pane using a registry edit.Read more

File Explorer: The file you are attempting to preview could harm your computer

Unblock file using Properties- MoTw. NTFS

After installing the October 15 (2025), cumulative update for Windows 11, File Explorer turns off the preview feature for files downloaded from the internet. After the October 2025 or a later Windows security update is installed, the File Explorer preview pane will display the following message:

The file you are attempting to preview could harm your computer. If you trust the file and the source you received it from, open it to view its contents.

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