A Note On HP Setup Ink Cartridges

Just installed a new printer cartridge and getting the "Incompatible Cartridge" message?

It may not be obvious, but when you buy an HP printer (and likely other brands) the cartidges you get in the box are SETUP ones. These are not the same as the standard size ones you'd buy from a shop. Apparently they have about the same amount of ink (although I'd question that), but the key thing is you have to use them the first time you use the printer and you can never use them again.