INSTALLING HP 845C PRINTER

Go to device manager and verify that the Universal Serial Bus is active and has no yellow or red marks next to it.

If Universal Serial Bus does not appear in device manager, then go to your system BIOS and "enable" the USB ports in your system (you should see a "Press F2 to enter SETUP" or something similar to enter into your system bios from a cold boot).

If everything is enabled and still the printer does not function properly, then I suggest going to control panel --> add/remove programs and remove the software. reboot. then run through a regedit and search and remove everything with "hewlett" in the key. Then reboot again and reinstall making sure that you are following the instructions as far as when to connect the printer.

The last HP USB printer that I installed required that the printer not be connected until after the software was installed, and the system waas re-booted.

Make sure to check any specific procedures for installation from HP.

Also, check for system driver updates from HP for the Pavilion.

I agree with all of the above and those things should be tried first. If you have done those things and you still cannot get the system to recognize the printer check and make sure that the printer is sending the correct data when you plug it in to the USB port. I recently had a CD burner that would register as a device with all ascii characters as it's device name. The problem was with the CD drive and the manufacturer had to replace it. If it is registering correctly you should be able to seeit in the registry or the task bar icon for Unplug and Eject Hardware. Make sure that the device is listed properly.

I have also seen the HP USB printers add a number of printer ports when installing software (it seems to install ports for the parallel ports as well as the USB ports for some reason). Check and see if you now have multiple port entries for the printer and that the correct one is chosen.