Have previously post Disabling Autorun on Windows. And found additional information, especially on USB Drives. Have read on Steve Riley’s blog that links to Nick Brown’s site.

From Nick Brown:

Sometimes the executable will live in a fake \RECYCLED folder, which is quite clever because hardly anyone ever opens the recycle bin on a memory stick, and because the folder doesn’t contain a real recycle bin structure, the worm will be safe, even if you empty the bin while the stick is in the drive.

From Steve Riley:

Nick also includes a little hack that effectively disables all files named “autorun.inf.” Interesting, but something in me prefers to make Windows just plain forget about all the drives it’s seen. So now I will amend my instructions. In addition to what I wrote earlier, you should also write a small script, and execute it through group policy, that deletes the following key:

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2

When I searched for it in my registry, I also found a few others, so maybe you’d want something that would search through the registry and delete them all, although I don’t know if such a tool exists — I’ve never had a need to look for something like that.