Windows NT4, 200, XP, and 2003,
when installed with the NTFS file system, support
the creation of hidden "alternate data stream"
files, but Windows Explorer cannot see them.

Stream Viewer adds a new tab to file Properties
windows, allowing you to see and optionally delete hidden
ADS files, which may pose a security risk and
can be used to hide "malicious" files on a PC.

Stream Viewer keywords: security, ntfs, ads files, streams