A few times avast detects a virus when i insert my pen drive saying its infected ,then i format my pen drive but virus warning still appears later i found that there was a file in system volume information which was replicating when i inserted my pen drive, i could not get rid of it so i used a trojan removing software, then the problem was gone for some days but now a file called bin appears in my "c:" drive and its replicating to my pen drive but avast nor trojan removing software seems to be detecting it ,please help :'(
