Luckily this is an easy, inexpensive fix. All you need is something called a USB hub. These can be obtained from most any computer store or 'big box' store like Best Buy. Here is an online source so you'll know what you're asking for. There are hundreds of other sources but here is just one.
http://www.staples.com/Staples-4-Port-USB-2.0-Mobile-Hub/product_837527
When you get it, you simply plug IT into your single USB port, and your printer, mouse or other devices into the remaining ports (most USB hubs have 4-6 ports). That's it. Now boot up your computer and it should see the devices plugged in.
I hope this response helps you out.
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