Cham,
Avast Quote:
Silent Mode is mainly for server operating systems. This option ensures that the resident protection will not require any user interaction and will not display any windows.
For this reason, it is not recommended to set "choose action" on the Virus page in silent mode, because the interactive action choice requires user interaction of course. It is better to preset some particular action, such as deleting the file or moving it to Chest.
It is better in my opinion to have the system stop at a potentially dangerous file so you can deal with it, then let it remain active on the system "free and clear" to continue its' destructive habit until you "deal" with it at the end of the scan.
Good luck.