I think I'm using the Vista driver but ticking the 'print grayscale' (or whatever means don't try to print colour) doesn't help. Anything other than pure B & W comes out in a wishy washy hue. I tried a Dell forum but my answer came back in Dutch! I think my 2nd hand printer must have been registered in Holland. Seems like I'll have to live with it or get another printer. Thanks to all.
Over and Out on this one.
Over and Out on this one.