Forum Discussion
Windows 11 Pro 25H2 build 26200.6899 - pane preview error
Dear Microsoft Support, After I upgrade Windows 11 Pro 24H2 to 25H2 build 26200.6899, when I pane preview file, it showed the message "The file you are attempting to preview could harm your compu...
The error you mentioned is due to security change while you upgraded to Windows 11 25H2.
It looks in Windows 11 25H2, Microsoft disabled File Explorer previews for Internet-downloaded files to stop a quiet NTLM hash leak.
With this change, the files downloaded from web sources can't be previewed like previous.
However, there is no effect on locally generated files and you preview them as usual.