Hi Paul-M,
I understand you have a Deskjet 3520 that isn't printing properly from your PC. I'm sorry to hear this, but I will do my best to help you once I've gathered a bit more information!
1. What Internet browser are you using? Internet Explorer, Firefox or Chrome?
2. If you only use one of those browsers, have you tried another?
3. Which version of Windows or Mac are you working with?
4. Have you tried different websites as well? Such as Google, your email, CNN?
Once I have this information, I should be able to assist you better!!