@ AndyOpie150

The latest ndiswrapper 1.58 is not available as a Debian package yet. But you can download the source from http://sourceforge.net/projects/ndiswrapper/files/. I had no issues when I tried it on Knoppix 7.0.5 CD with an Edimax 7811Un USB WLAN Adapter.

Save the file ndiswrapper-1.58.tar.gz somewhere, e .g /home/knoppix and open an LXTerminal. Issue the commands
Code:
tar xzf /home/knoppix/ndiswrapper-1.58.tar.gz -C /home/knoppix
cd /home/knoppix/ndiswrapper-1.58
sudo make uninstall
make
sudo make install
Read the man page of ndiswrapper.