Computer Won't Connect to Wi-Fi
The computer either doesn't see the Wi-Fi network in its list, sees it but fails to connect, or connects then immediately drops.
Quick answer: If other devices connect fine but this computer won't, the issue is almost always on the computer's side — a driver, a saved network profile, or the Wi-Fi adapter itself. If nothing connects to that network at all, the problem is more likely the router.
Likely causes
- An outdated or corrupted Wi-Fi driver
- A saved network profile with outdated password information
- The Wi-Fi adapter disabled in Windows or via a physical switch/function key
- Router-side issues if no devices at all can connect
What you can safely check yourself
- Check whether other devices can connect to the same network — this tells you whether it's the computer or the network
- Forget the network in Windows Wi-Fi settings and reconnect with the password entered fresh
- Check Device Manager for the Wi-Fi adapter and look for a yellow warning icon
- Restart the router if no devices at all are connecting
When it needs a proper look
If other devices connect fine but this computer consistently can't, and forgetting/reconnecting the network doesn't help, the adapter or its driver likely needs attention.