Hey guys...first post for me 
I think I'm having a similar situation.
i just installed bitdefender with my new system build.
i somehow got a trojan.generic virus.
Bitdefender recognizes it, says it will delete on reboot, but after deleting it, the trojan shows up again.
I tried Rescue Mode. but, for some reason, it hangs up at the welcome screen...and my cursor is frozen in the left corner of the welcome box...I can't select continue or go beyond that...
I haven't figured out how to remove it.
Thanks!
Kai