There are many solutions, most of them fairly simple. The easiest is just to not give them the password. Your WiFi should have a password, make sure that the computer can connect with the password but not the WiFi. To set or change the password, you have to go into the routers settings.
- Step 1
- Windows: Click on the “Start” circle menu doohickey, click on the text area right above it and type in “cmd”. This should bring up an item on the menu called “cmd.exe”. Click on it. A small black window comes up. Type into it the word “ipconfig”. A whole lotta text should stream by. Look for the words “Default Gateway” and the number next to it (it should look something like “192.168.0.1”). Get the thing listed as “MAC Address”. Go to the next step
- Mac: From the Apple menu, select System Preferences. From the View menu in System Preferences, select Network. Click on “WiFi”. Click on “Advanced”. Click on “TCP/IP”. Get the numbers listed as “Router” and the thing listed as “MAC Address”.
- Step 2: Type that number into your webbrowser like it’s a regular website. This should bring up the WiFi configuration menu. Look for an option called “WPA” or “WEP” Password. From there you can change it so that you need to type in a password to get on to the WiFi.
- Step 3 (optional): On your router settings screen there should be an option for “MAC address filtering”. Turn it on. Type in the MAC address that you got from Step 1. This makes sure that only your computer can connect to this WiFi.