I just bought an HP ENVY 4500 printer/scanner. It is downloaded and ready to go but when I ask it to scan, an error message comes up "No computer found". I CANNOT figure out how to get to going. I have installed, uninstalled, everything I can think of and followed most of the help advice to no avail. When I go in to systems and scan from my mac it only scans a line or two of the page. HELP please.
Desperate college student at the end of the semester.