Bulk Removing Zone.Identifier Alternate Data Streams From Downloaded Windows Files
http://thewayeye.net/2012/march/2/bulk-removing-zoneidentifier-alternate-data-streams-downloaded-windows-files
http://www.howtogeek.com/70012/what-causes-the-file-downloaded-from-the-internet-warning-and-how-can-i-easily-remove-it/
You can automatically remove them for instance from downloads after virus scanning them using Trend Micro HijackThis, it's in "Misc Tools -> ADS Spy".
http://www.filehippo.com/es/download_hijackthis/
(copiar streams.exe en c:\windows\ )
>streams -s -d H:\
(borra todos los del disco H)
