another big problem with AVAST5:
AVAST scan all JPG files; if disable AVAST; AVAST scan allways JPG files!!!
very big problem, can't disable this scan! if exclude folder, not work... problem sended to french AVAST support but

I use SyncToy to make backup (sync with echo) of all jpg files!!
With AVAST after 1 hours, not finish, and use more CPU! (same with Avast disabled, in monitor, can see all files scanned, and counter file scanned increase!!)
With Microsoft Essential, less than 5 minutes!