can't move files to Chest...false positive?

[pgbc07]

Hi, I installed Avast!free and ran it in this computer, it found several infected files, which I was able to move to the chest, then ran a boot scan, and again, whatever it was found was moved to the chest. But then all this files came up that I cannot move or delete. When trying to move them to the chest, I got the message "The request is  not supported (50)"
attached is the capture of what it came up after the scan.

thanks!

Pablo

[Pondus]

Follow this guide, create a new topic in the virus and worms section, and attach the logs requested
http://forum.avast.com/index.php?topic=53253.0