My friend got this on his computer. The most annoying thing for him was that his antivirus software would popup a warning message about this Trojan every now and then.
The BHO probably stands for Browser Helper Object; I could find it inside the Add-ons to IE, but deactivating it didn't help. Thankfully the antivirus was yelling which file the Trojan is in, it couldn't delete it because it was in use. Even in safe mode the file was locked.
I was able to delete it from command line after booting up the computer using windows install CD and choosing Recovery mode (or sth like that, I have German Windows :) ).