Get-childitem -path . -recurse | Unblock-file ^hot^ -

Always ensure you trust the source of the files before stripping their security identifiers.

This PowerShell command pipeline recursively retrieves all files and subdirectories from the current directory (and below) and pipes them to the Unblock-File cmdlet. The cmdlet removes the NTFS "Zone Identifier" alternate data stream (mark of the web) from files that were downloaded from the internet or other untrusted sources, thereby unblocking them. get-childitem -path . -recurse | unblock-file