Linksys Wireless Router :: E2500 - Set Up One Way Connectivity From Laptop?

I just installed the E2500 wireless router, and it works great for all devices we've tried so far. Here's the thing: we have a laptop that has been humming perfectly along for more that 12 years because we have never let it be touched by the internet. It has built in wi-fi, but we've never connected it. It has no viruses, no Microsoft creep, we've never had to purchase a virus software update and it has outlasted every piece of computer equipment we've ever owned. We'd like to keep it that way!
 
But now that the wireless printer is working beautifully, we want to know if there's a way to send the laptop through the router to the wireless printer, but not expose it to the internet. Is that possible?