This is a common problem with most HP OfficeJets. There are 2 main fixes to resolve your problem.
Below are 2 links. The first is a firmware update which contains patches and critical updates for your machine.
HP 7410 Critical UpdatesOnce on that page, select your OS and download.
After downloading and installing the program, search for Critical updates and/or updated Firmware.
If this doesn't repair your scanning issue, go to the link below and download the Scan Diagnostic Utility. This will search your network for any conflicts that could be interfering with your ability to scan.
HP Scan Diagnostic UtilityThis troubleshooter should successfully find/correct any communication issues you're having.
Lastly, you may need to re-aquire the device. Open HP Director and allow it to search for TWAIN devices. You may find more than 1 installed which is causing your conflict. If not, indicate your 7410 as the main scanning device and retry.