The proxy you typed is the one I really use inside firefox, it's manually typed.
what could be the site that infect my pc?
Hi miro8,
There is a big difference between any antivirus detecting a virus or malware and "ignoring" it. For the first, the malware must be known, and a detection written into the virus database to protect you and other users from it. For the second, 'ignoring' is not possible, as when a virus, a rogue program (in your case), or malware gets on your system,
it is because there is no detection signature for it as it is so new. Avast! and other antivirus programs cannot see it unless they are told to, and so cannot prevent it from installing and running on your system.
It is a cat and mouse game that has gone on for a long time now between the good guys and the bad guys, and unfortunately, this bad thing happened to you. The good guys can help, but they cannot prevent all bad things from happening, as catchup is the operative word here.
So the fix here is to be careful where you surf in the future, as even known good sites can get infected with this sort of stuff, and this sort of stuff will take advantage of obsolete or out-of-date (unsupported) software on your system and exploit that software to infect you.
So it can be any website that caused your problem, but you may have out-of-date software on your system. (See below)
Adobe software and Sun Java are the most commonly exploited software used by the bad guys to infect you when you do not keep them up-to-date. This is complicated, but it is enough to say that Avast! cannot fully protect you from software weaknesses in programs that they do not own or control. If Avast! did, then you could certainly blame Avast! for this situation, but since they do not...