infected with win 32:vb-cns[trj

pls help me :o my computer used to infected with win 32:vb-cns[trj… avast cleaned it but i dont know wat happend my drives cannot open its shows recycled\ctfmon.exe missing and i seen some options in rite clik menu open (o) , autoplay …and i can access gain by type drive: in run… pls help ??? ??? :cry: