I have a fairly old school set up on my desktop PC, my computer only wants to print things in a pink colour, I have tried replacing the printer cartridges and even another printer but things still only get printed in pink! it used to be print in full colour. I haven't tried it on my laptop, as it must be to do with the PC. my pc has XP, the printer is a HP deskjet 970Cxi. Thanks in advance!