Comment 2 for bug 659531

You can remove the driver using ndisgtk, then remove ndisgtk and the other packages installed with it using apt-get, but this does not stop the ndiswapper module being loaded. To do that you also have to manually remove the ndiswrapper configuration files.

The command apt-get --purge remove ndiswrapper-utils should remove these configuration files but it doesn't.

The manual entry for apt-get says "purge is identical to remove except that packages are removed and purged (any configuration files are deleted too)".