I have a problem with scanning in pictures and then using them in e.g. a power point presentation.
Even when I have reduced the size to 10% and saved the file as the lowest size and quality - there still seems to be a problem with printing the file. It takes ages and sometimes won't print at all because the file is too big.
Is there a way of changing this ?

Print speed is usually dependent on the file size, number of colours in the image, type of printer, processor speed and amount of memory in your machine. If it's slow printing even small images, then either your PC/printer is low-spec, or there's something wrong with the configuration somewhere.
Alex