Please click on this direct link to the Lexmark website to download and install Lexmark X4550 printer driver on your computer. Select your operating system > click on "FILTER" > click on the driver under Recommended Downloads > download and execute the file. Simply follow the instructions on your computer screen to complete the installation.
Should you need further assistance, feel free to contact us through email at firstname.lastname@example.org or chat with one of our customer advocates at http://bit.ly/boldchat (available Monday - Friday (US: 4:00am - 7:00pm EST; UK: 9:00am - 11:00pm GMT)). We'd be glad to assist you. Thanks.