HP Deskjet printer buying guide

Ok so i just bought a new printer in the past few months and its a good printer when it prints. The problem is that it keeps on making copies of itself. I think it might be doing this whenever I unplug the printer from my computer because I have noticed that it always asks me to re-register but I already have. This is so irritating because I never know for sure if I can actually print when I need it to work. Does anyone know why this is happening and how I can stop it?

I have a HP Photosmart A520 printer. I wanted to buy a refill cartridge and some photo paper.
For 120 sheets and an ink cartridge it was €35.99 for the canon version
The same amount cost €65.00 but was ‘hp’ brand.
Do you actually have to buy the same cartridge as your printer or was this guy just ripping me off?

I keep getting an “ink pen failure” pop up when I go to print. I have a new black ink cartridge and the color one is only three months old. The ink light also keeps flashing. I actually replaced the black ink cartridge twice so it can’t be the cartridge that’s the problem.
Help?????

cartridges that an “officejet” would use. I’ve got a brand new officejet and I’m wondering if I should use it to print pictures or should I buy a seperate printer just for pics?
Thanks

if you know great, if you dont, please visit any of these sites nad tell me your opinion, i have till tom. to figure out if i want it, nad i cant decide. my other printer sucks. it would print, but it would do it line by line, and take up to 10 minutes and all. and it would skip lines do this that and so on…
so what do you think… the good
the bad
the…
overview links:http://www.imaging-resource.com/PRINT/C4…http://www.pcworld.com/reviews/product/5…
selling sites (with description and all)http://www.shopping.hp.com/webapp/shoppi…http://www.amazon.com/Photosmart-C4680-A…
please please PLEASE, tell me your thoughts and opinions about it. it was released recently, so i am not so sure…
also i am looking for an all in one, (printer, scanner, copier) only. if you have any in mind please suggest. i prefer HP the most, so HP is my choice. umm. i found one for 79.99 of this printer, so anything to beat it works.. or any thing higher but more better also…