Troian Urausy

I’ve been using Internet virus protection for 3 year and this is the second time my PC is infected by malware Troian Urausy.
This virus blocked my pc with a message asking to pay a fine because of italian law violation but it is a trick well know by italian postal police.
Why Avast doesn’t detect and protect my PC from this virus?
First time I had to pay a local provider to remove it now I would like to try to remove it by myself but I’m not an expert.
Could you please help me?

Follow these instructions please: http://forum.avast.com/index.php?topic=53253.0

Associated Urausy Trojan Files:
%AppData%\skype.dat
File Location Notes:

%AppData% refers to the current users Application Data folder. By default, this is C:\Documents and Settings<Current User>\Application Data for Windows 2000/XP. For Windows Vista and Windows 7 it is C:\Users<Current User>\AppData\Roaming.

Associated Urausy Trojan Windows Registry Information:
HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = “explorer.exe,%AppData%\skype.dat”

Why Avast doesn't detect and protect my PC from this virus?
no security program have 100% detection and the bad guys release new versions every day to avoid detection

It is as with human viruses. Doctors/Scientists can only find a cure for something that exists.
It i not possible to find a cure for a disease that doesn’t exist.

Hey,

I’ve been using avast! for a number of years now. It may have it’s faults but overall it’s much better then AV’s like Norton, Macafee, AVG etc. On a regualr basis I attempt to test Avast! Most malicious sites are blocked. But not all of them. Just like the best of the best get infected. Every one time or another will have a virus. garuntee it