Password Protected Files Cannot Be Scanned - WTF??

I ran a quick scan of my system which showed a list of files. After the scan, I get a window saying some files could not be scanned because they were password protected. And it also says to select the files for further action. But theres no way of selecting any file. Attached is a pic showing this pop-up message. What does this mean? How do I fix this?

http://blog.avast.com/2014/02/28/how-do-i-handle-files-that-avast-cant-scan/