Virus that respawns??

I have some kind of virus that keeps reapearing in my my documents folder. At first all it was a setup file called index.exe and I could delete it now there are like five files and a .dll file. I can delete everything but the .dll file. I can't delete it in safe mode or through dos.I even renamed the file extension so windows couldn't regonize it but keeps coming back! I even tried moving it to an encrypted file to atleast contain it but it can't be moved now. When I start my computer I get a message that windows has stopped index.exe from running because it was using to much memory.


I would really appreciate any help for this!!!!!