All you knowledgable peeps in here.  They don't have to stay on all the time do they  I just seem to have probs with mine when it's been switched off and I switch on again to print. Mine's saying it's out of paper, when I've just checked and clearly it's not. It also said my printer was off line and it seemed to take an awfull long time to come back on line. I've un-installed and re-installed the software a good few times but obviously I shouldn't be doing this. I've finally got it to print but was a faf and I'm wondering if anyone can help  Soz for the long post and thanks in advance  It's an HP Photosmart C4780