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I can't tell you for sure.
However, if you are using an HP Printer, that is NOT also a scanner, you should be able to uninstall the junky HP Software they give you, and OS X should reconize the printer. pipedaemon seems to run all the time (when I had HP Drivers installed...) I think it tells the printer whether drivers are installed for the scanner, so that the printer can send pictures from the scanner to the Mac. Of course, if it isn't there, the drivers aren't installed. That'd be my guess.
As for uninstalling, I'd leave it installed if you have a scanner on your printer, if not, try uninstalling it, and seeing how OS X's Printer Utility deals with the printer. If I'm wrong, simply reinstall the HP Software.
However, if you are using an HP Printer, that is NOT also a scanner, you should be able to uninstall the junky HP Software they give you, and OS X should reconize the printer. pipedaemon seems to run all the time (when I had HP Drivers installed...) I think it tells the printer whether drivers are installed for the scanner, so that the printer can send pictures from the scanner to the Mac. Of course, if it isn't there, the drivers aren't installed. That'd be my guess.
As for uninstalling, I'd leave it installed if you have a scanner on your printer, if not, try uninstalling it, and seeing how OS X's Printer Utility deals with the printer. If I'm wrong, simply reinstall the HP Software.