It is quite possible that when you try to install your HP XP 3390 printer you will get a message asking you to provide the .DLL file. In the absence of this file, you will never be able to continue with the installation. You may wonder why your CD doesn’t carry the required file either. It is strange but is true. The only way for you to install your printer is to download this file from the internet. However, it is not an easy task to find it in the internet. But in case you are confronted with this problem, you have the option to download your HPXP3390.DLL file here.