I am trying to connect my Lexmark X4550 all in one to my new laptop and i do not have the disk

click start control panel administrive tools computer management device manager scroll to ports(COM&LPT) + to expand you should see a communication port and Ecp printer port you might see a yellow? ! question exclamation mark or a red X this will mean you need to install a new driver for this device right click you will have options to update driver,disable,uninstall or select properties again you will have the similiar options also you can troubleshoot the device
if you dont have the driver you will need to download one
http://download.cnet.com/lexmark-x1100-series/3000-2118_4-62934.html
The Lexmark X1100 Series All-In-One combines the functionality of an inkjet printer, a scanner, a copier, and a fax machine all into a single, multifunction device, making it one of the most exciting products on the market today
hope this helps you