- Right click Folder->Properties->Hidden-> OK
- Change file extension Right click folder->click rename->if video file extension is flv change .doc nobody open it.
- Zip the file with encryption and password lock lets Try Right click Folder->click zip->Advance option click password protection->enter password-> OK
- use true crypt free software for hide hard drive/virtual drive. click->http://www.truecrypt.org/downloads
- use folder-lock free software available on web download.