How to get my Acer laptop to work with my Lexmark p4350 printer having mislaid the original cd?

Go to tucows.com and search for "driver update". There are several and some are better than others.

Or you can go to lexmark.com and try to figure out how to find the driver you need.

The one I use is Iobit Driver Booster from download.com but it constantly tries to trick you into paying when it's supposed to be free.