How do you get rid of Trojan horse downloader istbar dd?

i went to dl AVG anti-virus version 7 and it manages to detect the Trojan and delete most of them... as for those which are unable to heal or delete... try to go to the foler that consists of the infected file and the anti virus shd prompt u abt the Trojan... den.. u can safely delete the Trojan horse... hopes it help...