The HP printer drivers are probably in the add/remove programs screen somewhere, waiting for you to uninstall them.

If the onboard sound is disabled in the system BIOS but is still showing up in the device manager, then deinstall the drivers from the device manager via a right click.

If your only complaint is that these things show up in the Driver Detective screen: Fugheddaboudit. Those files don't go "active" until you plug in the device in question, and having the files sitting there shouldn't hurt anything. In what way, exactly, are they "confusing" driver detective?