"... is there a 3 in 1 that will scan to computer when I press the "scan to" button..."
Yes the one you have now will.
Where is the "Scan to button" ? - a button on the printer, or a button to click in the software?
What actually does happen when you click it?
Have you got an "HP Solution Centre" icon on the desktop, or in the Program menus - if you have, what happens when you click that?
Has it worked previously?
Did you (or someone else) install the software which came with the printer, following the installation document - or did you just plug it in?