HP Deskjet 842c Printer - Manual (Page 25)

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I accidentally cancelled the USB installation the
first time I connected my HP DeskJet printer to my
computer. How do I get it to appear again?
To redisplay the USB installation screens:
1 Disconnect the USB cable from your printer.
2 Insert the printer software CD (or Disk 1 if you have diskettes)
into your computer.
3 Click Start ➙ Run .
4 Browse to your disk drive and select Setup , then click Open .
5 The setup.exe file will appear in the dialog box. Click OK .
6 Select the Remove HP DeskJet 840C Series Software
option.
7 Connect the USB cable to your printer again. The USB
installation screen should appear again.
8 Continue with the first step of “USB Step 7: Install USB and
printer software” on page 21.
When I install the USB software, I get an “Unknown
device is found” message.
Disconnect the USB cable, remove the printer software, and turn
off the computer and printer. Unplug the electrical power to the
printer, then reconnect your printer and restart the USB
software installation.
After I installed my printer, why isn’t my HP
DeskJet printer assigned to an LPT printer port in
the Print dialog box of my software application?
USB uses a different naming convention for USB devices. After
the printer has been installed, you see
USB/DeskJet 840C/
(serial number of your printer).
How can I increase printing speed?
When operated on a USB chain, your printer may become
slower if other USB devices or software applications are being
used while you’re printing. For optimal print performance, avoid
using other devices in the USB chain while printing.