Align the cartridges and your message should go away. It's not really measuring ink level but useage and should reset when it sees a new cartridge or printhead. If you're using aftermarket or refilled cartridges, reevaluate your use and cost. My experience has been that those typically exhibit around a 30% failure rate. If you've got a high volume, look into a laser printer.
Even better, get rid of the intrusive and invasive HP imaging monitor software. You can load the base drivers instead of the bloatware.