ok i am currently running SAS again and it has found a trojan.DNSchanger-codec, i have been looking for ways to get rid of this threat but it seams that it will just re install itself on reboot according to most of the stuff i have read, is there any way to get rid perminantly? i am still in the middle of a SAS scan and it has only found this 1 threat so far, one post i read said that this type of hack is designed, amongst other things, to shut down the antivirus software, and not let you update, seams i have found the problem to my avast being switched off involunterily, any suggestions as to removing this threat perminantly?