Never think you are silly or an idiot for asking a question here. We learn by asking!

Anyway, it depends on what Avast is telling you after the scan is complete. Most of the files you see listed are probably passworded files, or located in the System Restore directory. Avast will tell you that it was unable to scan them (for whatever reason it states)
In most cases…not to worry.

I would need to see the list in order to advise you any further. However, if there were any files that Avast was worried about, it would say so and give you a choice to Delete the file/s or Move the file/s to the Chest (where they won’t hurt your computer until you can figure out what to do with them. hahaha)

If you know what to do with a Screen Capture program, then send me a pic of the Avast log. You can get a free one at www.gadwin.com

If you don’t have a clue as to what I am talking about, don’t worry…sometimes I don’t either. hahaha

Let me know if I can help further.

;D