This is working OK on my avast free 2208 - just about to check it on my win7 netbook.
Whilst checking on my win7 netbook, I got an permissions popup for avastSvc.exe making a connection, so I don't know if this file you can't find is off-line, which would seem strange. After giving permission the page displayed.
Checked the ? on several other pages, same result page displayed - as I would expect from the first instance.
So I just wonder if this isn't a localised issue, were the translation hasn't been completed in all languages.