Super User is a question and answer site for computer enthusiasts and power users. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Possible Duplicate:
Computer is infected by a virus or a malware, what do I do now?

In this case it's the TR/Alureon.19456U.3 trojan. On this Antivir site it's stated to be detected:

The system in question doesn't have the symptoms (lags, Firefox crashed) either.

Is there a way to be sure the trojan is not active?

share|improve this question

marked as duplicate by ChrisF, Oliver Salzburg Aug 16 '12 at 10:57

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

There is a more general question here:… . – masi Sep 21 '09 at 22:51

If the AV specified has it in the database, the only way to be 100% sure would be to use that program to scan the computer in question, Or do a fresh OS install. Even the first option can be a bit flaky, as some viruses can change their characteristics dynamically by being updated via the internet or other means. A fresh install is the best way to ensure the machine is clean 100%.

share|improve this answer
+1 that's right, John, can't trust these previously infected systems :) – Molly7244 Sep 21 '09 at 23:03

Well, it showed me the virus one time, where I deleted it and all it's components. After several virusprogs including a live CD, it does not show anything like a virus anymore, also I have no problems like "lag" or firefox crashing, etc.

Is it gone? I don't know. But setting up a whole new system (fresh install) would take some time AND I don't have some passes for some progs anymore, which would again cost a lot of time to get them via phone, aso.

share|improve this answer