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#41
Since the family account is likely a Standard User account, I'd boot into it to install the HP Printer software which will prompt for Admin permission. This should give it full rights and features.
If HP Solution Center is allowed to boot with Windows in msconfig>Startup then you should be able to initiate the scan from the printer top and from it's icon on the desktop. Otherwise you'd need to use the Windows Scan utility on the Devices and Printers rightclick context menu when you click on the printer.