here's what to do....

I turned on SSID broadcasting and set encryption to 64 bit using key four on my router. This might not be critical BUT I did it to make life easier and eliminate potential issues.

I then found my working pc and entered the passphrase. This converted it into Hex for me in all four of the keys.

I turned off the Dell software for the wireless and used the windows stuff instead. I set up a new profile as per usual. I copied the key I had set the router to use (in this case 4) into my key four in Hex, the format of this is just the hex numbers, no : or spacing etc.

Voila.