Since there is no specific Lexmark X9350 series printer driver specific for Windows 7, use the Vista driver instead.
Before downloading the printer driver, please check if your Windows 7 is running on 32-bit or 64-bit operating system for compatibility. On your computer, go to Start menu > right-click on Computer > click on Properties. Take note of the System Type.
Click on the link below to download and install the corresponding printer driver for your operating system: