Unfortunately you are not following me, and I am not following you.
One poster on this thread has said that these weird files are files created by VISTA. Another poster on this thread has said that these weird files are temporary files created by AVAST when it encodes or inspects certain types of files.
Question #1: Which of these two is true?
The next thing -- regardless of whether VISTA is creating this file, or whether AVAST is creating this file, AVAST is finding a "decompression bomb" in ONE of these files.
Question #2: What is a decompression bomb, and what do I do about it? AVAST does not allow me to deal with it with the MOVE or DELETE option.
Finally an observation: I went to your "settings" link. On that page, I searched for the word "Decompression" and I searched for the word "Bomb". (I did this without trying to match case). It seems that neither word exists on that page, so I am unable to find anything about decompression bombs on that page.