the pc sharing printer has to be on when you want to use it since its usb.
(on the pc with the printer that you want to share)
click start > devices and printers > right click on the printer and select "printer properties" > click on the "sharing" tab > check the box for "share this printer" and type a description
(on the pc that you want to connect the printer to)
click start and type \\computername (this is the name of the pc that is sharing the printer) > right click on the printer and select connect
if you are not sure of the computer name press the windows key + pause\break at the same time an a box will pop up with the computer name on it.