Windows Security Warning when moving files in F drive - Fix: “These files might be harmful to your computer” prompt when moving files from file server

Users see a Windows Security prompt—“These files might be harmful to your computer”—when copying/moving files from our file server. This happens when Windows treats the source as Internet/Untrusted instead of Local Intranet, or when files carry a Mark-of-the-Web (MOTW).

Root Cause

• The server/share is not listed in the Local intranet zone, so Attachment Manager warns on file operations.

• (Sometimes) Individual files are tagged.

FIX

• Open Control Panel → Internet Options (search “Internet Options”).

• Go to Security tab → select Local intranet → click Sites → Advanced.

• Add the following (adjust for your environment): \\26.159.157.183\ and/or \\10.1.1.6\

• Click Add, then Close → OK → Apply.

• Close File Explorer windows and retry the copy/move.