Help please with Trojans dldr.agent.AP.2 exc...

Hi everybody!
I have huge big problems with some trojans that ANTIVIR will find in my system everytime I start explorer they are 3 :

Dldr.Agent.AP.2 ,
Dldr.Agent.AP.3 ,
Dldr.Agent.BQ and
Dldr.Winsh.AC.O2 .

I tried everything and even more software to remove them but nothing they are always there everytime I start explorer and also a popup window with a search engine I don't want appears.

I found very few news about it in internet and mainly in german,but i don't understand german !!!

I post also my hijacKthis log file.

I thank in advance everyone can tell me something to remove the trojans!
Thank you all!
Greetings
Luca

[log removed]

 

Please follow all the steps in this Sticky thread READ ME FIRST BEFORE ASKING FOR SUPPORT: Basic Spyware, Trojan And Virus Removal


If you already have any of the programs linked in the tutorial please double check your version to make sure you have the latest one and that you have any/all updates for the programs.

NOTE: In order to resolve the issues you are having it is very important that you at least try to perform all the steps as outlined. If you have any difficulty please post back letting us know what steps you have completed, what you found while doing the scans if anything and details about any problems you have encountered in completing the steps. The more details you can provide the better.

We'll ask you for a log file if this doesn't fix it. When we do, please make sure you run it from a location outside of "documents and settings" , a temp directory or an archive. C:\HijackThis will be perfect.