Lexmark X9350 All-in-one Printer Driver
Windows 2000
Windows XP
Windows Vista
Lexmark X9350 Printer Driver (2000/XP) (26)
Lexmark X9350 Printer Driver (Vista) (28)
Lexmark X9350 Printer Driver (XP-64bit) (13)
Lexmark X9350 Printer Driver (Vista-64bit) (18)
From this page as a free Lexmark X9350 download. (32bit and 64bit)