Clevo and everyone.Yes! I've become so used to issues with Vista SP1 and this seemed to coincide with other problems resulting from its installation that I had overlooked the obvious.
I ran a nozzle check and no photocyan showing at all. Ran the cleaner and hey presto, back to beautiful photos in natural colour.
So thanks to you and everyone who tried to help.
I did have a for real driver problem but I've now managed to get them to install but the pink cast was an ink flow problem.
Sorry to have wasted peoples time and many thanks, John
PS Clevo, that inkjet site is excellent, cheers