Did you check for the touchpad driver? Go to Device Manager and find the touchpad driver. Chech if there is a yellow exclamation on it. If there is, right click on it and select Update. Then install the driver manually.  Good luck.

Yeah, like the previous answer to download the driver from the Lexmark support website. Also you could use a third party tool like OSToto Driver Talent to download and install the driver automatically.

http://www.drivethelife.com/

Three methods for your reference.

1. Go to manufacturer's website to download the driver and install it manually.

2. Locate to Device Manager and find the driver, right click on it and select update.

3. Use a driver install tool. OSToto Driver Talent is recommended to you. It is able to quick scan printer driver and add the driver for you.

Hope it is helpful to you. Good luck.

Try to use a third party tool like OSToto Driver Talent to download the driver for you. Instead of looking for the driver online or asking help, you just need to make a one-click to install the driver.