Hello Andrija7 and to Bleeping Computer!
We hope you enjoy you time here and please, don't be afraid to ask questions, we are here to help.
To familiarize yourself with Bleeping Computer and how it works, I suggest that you check out New User Orientation
You may want to check out the Tutorials
section of Bleeping Computer as you may find these useful.
Also, if you would like to familiarize yourself with the functions of the board and posts etc. you can try out the Tests and Scribbles
Since your computer is infected with a Trojan, you might also want to take a look at the HJT Logs and Malware Removal Forum
and then run a utility called HijackThis and then post your log, but first make sure you read this topic
before you post.
So, once again, Welcome to Bleeping Computer, we are a very friendly community and willing to help with any problems that you have and once again, don't hesitate to post on the forums, as that is what they are there for.
Enjoy your stay!