Hi ralph_kubota_ma,
Welcome to the HP forums!
I understand you have an Officejet L7680 that is telling you another program is using the HP digital imaging device thus not allowing you to scan. I believe I can assist you in resolving this issue, so let's see what we can do :)
My recommendation would be for you to read through and follow this 'Scan Cannot be Performed Because Another Program or Computer is Using the Networked Device' Message Displays in Windows When Scanning Over a Wireless Network document.
Once you get through it let me know how everything goes for you!