Completely turn off Autorun on Windows XP

Hello everyone. I have a question that is only partly off-topic: Is it possible to turn off Autorun on Windows XP?

I am deeply disappointed with the recent MS "Security" update: while it prevents the system from starting PortableApps.com automatically, it still takes ages to process the key or hard disk to tell me that "there are different media on it; what application do I want to use?"

On another computer with Windows 7, I don't have that silly behaviour: I connect a disk or insert a USB key and nothing happens (courtesy of the "Autoexec" Control Panel); I just have to open the Windows Explorer and click on StartPortableApps. Is it possible to have the same kind of straightforward behaviour on XP?

Thanks