Member Avatar for sidoe

I'm not sure if my laptop has WiFi built in. How can I tell?

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Three quick ways to tell whether a laptop has built‑in Wi‑Fi: check the system’s network interfaces in the OS, look for hardware controls or slots that indicate wireless, and verify the model/spec page from the manufacturer (as suggested). Posts here correctly point out OS tools and model lookups; the notes below expand those checks and add practical steps for older machines like ’s Compaq Presario 900us and for people who reinstalled Windows (see ).

On Windows, open Device Manager and inspect Network adapters for any entry with “Wireless”, “Wi‑Fi”, “802.11” or vendor names such as Intel, Broadcom, Qualcomm/Atheros, Realtek. Also check Control Panel / Network Connections (older Windows) or the system tray Wi‑Fi icon. On macOS look under System Preferences -> Network or About This Mac -> System Report -> Wi‑Fi. On Linux, use these commands to find wireless hardware and blocks:

lspci -nn | grep -i network
lsusb
ip link show
iw dev
rfkill list all

Physical checks and add‑ons: older laptops often didn’t include internal Wi‑Fi but had a PC Card / ExpressCard slot or used USB adapters; many newer machines use internal M.2 (NGFF) Wi‑Fi modules. If the laptop is older (like many Presario models) look for a side PC Card slot or a removable module; if you need Wi‑Fi now, a USB Wi‑Wi adapter is the fastest option. Internal upgrades are possible but check driver availability and the OEM support notes first—some models restrict supported cards in BIOS, so verify compatibility before buying.

Troubleshooting tips tied to forum comments: if Wi‑Fi existed before an OS reinstall but is gone, Windows will often show an “unknown device” or a yellow icon in Device Manager—install the vendor wireless driver from the model’s support page. If an adapter is present but can’t see networks, check for a physical wireless switch or an Fn+key toggle, verify the interface isn’t soft/hard blocked (rfkill on Linux), and reinstall drivers. and were on the right track about checking OS tools and model/spec details; combine both approaches for a quick, reliable answer.

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All 9 Replies

Member Avatar for MAD_DOG

What kind of labtop is it?

Member Avatar for sidoe

Compaq presario 900us

What kind of labtop is it?

Member Avatar for sidoe

nope i don't have it .. next question is how can I get it? thx

www.compaq.com or www.hp.com look up your labtop and see if it has built in WiFi

Member Avatar for kc0arf

Hello,

I don't know if you are running Windoze or Linux, but you should be able to go to the Device Manager (windows) or ifconfig (Linux) and see if there is a network device installed.

You can get WiFi with PCMCIA cards. There are two options: 802.11(b) {more common, slower, widely avail) or 802.11(g) {faster, not as common}. I have a (g) card that will go down to (b) when necessary. You might also be limited on speed in consideration of what transmitter you have in your house. Again, I got a dual speed unit to support more options.

Enjoy,

Christian

Member Avatar for LISAMAXY05

Ita a windows vista basic

Member Avatar for Tieyshia

My windows xp professional crashed I had to reload windows xp home addition service pack 1 back onto it how do I find the wifi that I had before it crashed.

Member Avatar for zxor 2

check the model no and serial number on the manufacturers website the mod no will give you list but the system number will give you all the details about your laptop and the parts inside it

Member Avatar for gaylon

My laptop is a Compaq model 2140us using windows xp sp 2, how can iterll if it has wi-fi or is wi-fi capable and where can i download the programs

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