Below on this HP page, you will find links for downloading DesignJet T1120 driver you need.
A N8400GS-D512H driver is an important program for your HP laptop or computer, as it promotes correct functioning of your VAIO VPCL118FG device. Moreover, a driver can promote correct functioning of any other device, e.g., a printer, a scanner or a display card. As a rule, your Lifebook T1010 unit is already furnished with a CD with the proper DesignJet T1120 driver set. If the CD is lost, please take advantage of the Lifebook T1010 link for DesignJet T1120 downloading.