Avast is not good in detecting Trojans?

I heard a lot about F-Prot… for me, after all this time, don’t worth to have it as a backup scanner. Difficult to update (need a third party) and detects nothing, even when I’m absolutely sure about the infection.

Thanks. and And whats more effective to have Web Shield in Normal or High? and what happends if i dont use intelligent stream scanning of the Web shield?

My experience with F-Prot for DOS has been very good. It’s a command line scanner so you only need an internet connection and an open DOS command prompt to udpate and scan. Same thing with the F-Prot Linux version. Also, F-Prot for DOS is great for Win98 and Avast! since Avast doesn’t scan the boot sector on boot up and F-Prot for DOS will. All you need is a batch file to scan the boot sector and root directory with F-Prot on startup and Avast! runs after that in Windows GUI. Worked great for me when I was using Avast! with Win98.

If you search intelligent stream in the board you’ll find something.
You can use full WebShield power clicking ‘Control’ in my signature and using AEC option to it.