HP Deskjet 3520 Inkjet Printer - Manual (Page 60)

printer is slow
Several variables can slow the printer's performance.
multiple software applications are open
The computer does not have sufficient resources for the printer to print at its
optimum speed.
To increase printer speed, close all unnecessary software applications when printing.
printer driver is outdated
An outdated printer driver may be installed.
For information about updating the printer driver, click here .
computer does not meet system requirements
If your computer does not have enough RAM or a large amount of free space on the
hard drive, the printer processing time will be longer.
1. Verify that the computer's hard disk space, RAM, and processor speed meet
system requirements .
2. Free up space on the hard drive.
printer is in ink-backup mode
The printer may print more slowly if it is in ink-backup mode .
To increase the print speed, use two print cartridges in the printer.