How to get rid of lines in pictures and text with a canon Pixma Ip1800 printer? -

i have a pixma IP1800 and whenever i print pictures or text i have white lines through it. i have tryed to fix it, but cant seem to find out how to.....i dont know if this helps but some thigns have to do with your comptuer i have been reading and i have a vista.

re align the printer head from the software.