Unblock File -

When you try to run that file, Windows Defender checks the tag. If it says "Internet," Windows assumes the file is hostile until proven otherwise. It locks the file, preventing PowerShell scripts from running, DLLs from registering, and EXEs from executing.

If you are looking for academic papers that are locked behind a paywall, several legitimate and community-suggested methods can help you find free versions: How to Unblock Blocked Files Downloaded From the Internet unblock file