Several questions which may help us help you.
1) Are you actually using Kubuntu Linux, the subject of this site?
2) If so, is your HP photo scanner hardware directly connected to your computer? If not, where is it?
3) What software are trying to use to operate the scanner?
4) Norton Antivirus(tm) is NOT a firewall. It is a piece of WINDOWS(tm) software that looks at (scans) the memory of your computer searching for viruses Norton Antivirus will not work in Kubuntu LINUX. Is that what you are trying to do?
An observation: if you consider the value of your time and the cost on your health of the aggravation you are experiencing, you have probably exceeded the 20 pounds that the HP people would have charged you.
