Deleting the file also deletes the stream (in as much as deleting a file marks it as OK to overwite). Scott Hanselman blogged several ways to remove streams in

Deleting the file also deletes the stream (in as much as deleting a file marks it as OK to overwite). Scott Hanselman blogged several ways to remove streams in 2007 (http://www.hanselman.com/blog/RemovingSecurityFromDownloadedPowerShellScriptsWithAlternativeDataStreams.aspx http://www.hanselman.com/blog/RemovingSecurityFromDownloaded...).