I tried this device with 2 different PCs and 2 different printers. The first printer was an HP Laserjet 5P. Plugged it in and the Windows 7 64-bit OS found the printer, but when I tried to print, no output - test page or Word file. Looked up support on Sabrent's site. Tried all the suggestions, and it still didn't work. Since that one didn't work, I tried another Windows 7 64-bit with an HP 710C. Did all the same steps, and it didn't work either. Sent it back.