How can I remove this Folder?

I am facing a serious problem with my Computer. There is a folder in every drive called – AUTORUN.INF. To remove this folder I have used many anti viruses like – Norton, Avast, ESET Smart Security 4 and Bit Defender. But still I can’t remove this folder. Even I have reinstalled my windows XP in system and nothing is happen to it. Now how can I remove this folder?
