Checking the Model of Your Laptop
Look on the bottom of your laptop and find the model number. Your laptop will have a model number printed on the bottom--a series of numbers and letters. Copy them down onto a piece of paper. If you can't find the model number on the bottom of your laptop, check the battery case. It may be located inside.
Search for the model online. Type the model number of your laptop into a search engine, and can easily find the specifications for your laptop. This will give you all kinds of detailed information, including whether or not your laptop has a WiFi card. If your laptop has been modified since manufacturing, or you bought it second-hand and you're not sure, then you may want to use alternative methods.
Checking on Windows 7 or Lower
Open the Control Panel from the Start menu. The Start menu is located at the bottom left of the computer screen. Click on the Start button to open the menu, then click on "Control Panel."
Find the Device Manager in System and Security. When the Control Panel opens, locate the icon that says "System and Security." Click the icon, then select "System." Within the System folder, you will see the Device Manager. Click to open. You may be prompted to enter an administrator password or confirmation when opening the Device Manager.
Click on "Network Adapters." The Device Manager shows you all the devices installed on your computer. Open "Network Adapters" to find a list of any Bluetooth, Ethernet, or WiFi Adapters.
Locate your WiFi Card. There is no one name for the WiFi card, so you will have to go through the list and look for something with "wireless," "802.11," or "WiFi" in the name. If you don't see anything with "wireless" or "WiFi" in the name, then you do not have a wireless card.
Checking on Windows 8 or Higher
Open the side menu at the top-right of your screen. Move your mouse to the top right-hand corner of the screen and swipe down. A side menu will pop up.
Click "Settings." You will find "Settings" at the bottom of the menu. Click to open the folder.
Look at the first of the six icons that appear. A new interface appears when you click "Settings," with six icons at the bottom and five clickable tabs. The first of the six icons should look like five bars, starting small and get larger. If you see this icon, you have a WiFi card in your laptop.
Checking on a Mac with OSX Yosemite
Open "About This Mac." Move your mouse to the Apple logo in the upper left-hand corner of the screen. Click to open a drop-down menu, then select "About This Mac" from the options.
Click on "System Report." There are different tabs at the top of the "About This Mac" window--stay in the tab labeled "Overview." Locate the button that says "System Report," and click to open.
Open "Network" to see your WiFi information. Scroll down on the left panel until you find the "Network" heading and click to expand. Click on "Wi-Fi."
Locate your card information under "Interfaces." If you have a WiFi card, it will appear here. It will say "Card Type" and then tell you the name of your card, such as "AirPort Extreme" (yours may be called something different). If you don't have a card, you might also see the error Wi-Fi: No hardware installed on the top right corner of the screen, along with the date and day.
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