|I have seen this before, here are the 2 most suspicious things that I would suggest you to look at|
- BIOS disabled network card, go into your bios and make sure that your network card has not been accidentally disabled. If you have not touched your BIOS below it is likely the following.
- Hardware disabled network card, power on your laptop, check all the buttons and hot key (usually in fn key + light blue highlight) on the laptop for something that resembles Internet connectivity, click that and give it a couple minutes, if your computer begin to churn it is likely you may see the card in your device manager soon.
Though in my personal opinion both designs were bad practice by the hardware manufacturer that makes troubleshooting that much harder for marginal or no practical benefit. Most I can think of is power saving... just disable it using software, that's more intuitive for average users.