Hi,
If your printer is HP Officejet 100 Mobile printer -L411a, you can download the drivers from here. Please selecte the correct opertaing system type from the selection before downloading.
http://h10025.www1.hp.com/ewfrf/wc/softwareCategory?product=4231408&lc=en&cc=us&dlc=en&lang=en&cc=us
-I work with HP, but these comments are my own.