I've lost the CD disc to load 1100 Lexmark printer on my Laptop

You need to install the driver software form disk before connecting the printer.

If you do not have the disk you must download the software from Internet, follow instructions below,

Click here:Official Lexmark Drivers and Software

A web page will open, follow instructions, select model, select operative system etc., and click on download .
Chose to download the file in my documents when asked.
After downloading, findthe file, double click on the file , then if you get introubles, followthe instructions below to reset and reinstall drivers:

• Unplug printer USB.
• Go to control panel >> installed printers in Windows and remove (delete ) any installed printer from printer list.
• Download driver from website, or use the disk and run the install file.
  
• Follow driver installation wizard.
• Plug back printer when prompted from installation wizard.