Unblock Multiple Downloaded Files

http://superuser.com/questions/38476/this-file-came-from-another-computer-how-can-i-unblock-all-the-files-in-a

To recursively remove this stream for all files, follow these steps :
1.Download the Streams CLI executable from Microsoft
2.Put the streams.exe executable in your Windows directory (or anywhere that the system can find it)
3.Run this line in the command line :

streams -s -d directory