This issue has been remained for such a time now, i personally don't know what the trojan is capable of, but i certainly don't appreciate any trojans what so ever. And its so fking lame that this trojan includes from the install knightonline provides us with.
so for the people who are not aware of this, let me help you!
1) download this awesome popular prog
Spyware Terminator - Free software downloads and software reviews - CNET Download.com
and just search on your gamersfirst map, and it will find that trojan infected on your launcher.
2) when you have deleted it then go to this site
and download the launcher, and replace it in your gamersfirst folder.
and your good to go
if this issue has been posted before then I apologies, if not your welcome