Wi-Fi connected but no internet, explained and fixed
Your device shows full Wi-Fi bars and says it is connected, yet no website loads. That split means the local link to the router works, but the path from the router to the internet, or from your device to the router's DNS, is broken.
The fix, in order
Check another device first. If nothing on the network has internet, the problem is the router or the internet service, not your device. Restart the modem and router: unplug both for 30 seconds, plug the modem back in first, wait for its lights to settle, then plug the router back in.
Restart the device. A stuck network stack is a common cause, and a restart clears it.
Forget the network and reconnect. On Windows: Settings, Network and internet, Wi-Fi, Manage known networks, select the network, Forget, then reconnect and enter the password again.
Flush DNS and reset the network stack. Open Command Prompt as administrator and run, one at a time: ipconfig /flushdns, netsh winsock reset, netsh int ip reset, then restart.
Try a different DNS server. If the router's DNS is failing, switch to a public one such as 8.8.8.8 and 8.8.4.4 in the adapter's IPv4 properties. You can check whether names resolve at all with the DNS lookup tool.
Check for an outage or a bill issue. If the router's internet light is off or red after a restart, the service itself is down.
Do not pay anyone who calls or messages claiming your Wi-Fi is hacked and offering to fix it for a fee. That is a scam, and no legitimate fix for this problem arrives by phone call.
If it still happens
If other devices work but this one still shows connected with no internet, run a full Network reset (Settings, Network and internet, Advanced network settings, Network reset) and reinstall the Wi-Fi driver from the computer maker's support site. If every device is affected even after a router restart, the fault is with the internet service, so contact the provider.
Common questions
Why does my phone work on the same Wi-Fi but my laptop does not? The router and internet are fine, so the fault is on the laptop: a stuck network stack, a bad saved profile, a wrong DNS setting, or a driver problem. Forget the network, reset the stack, and update the driver.
Does restarting the router really help? Yes, often. Routers run for weeks without a break and can hang, especially after a firmware hiccup or a surge of connected devices. A 30 second power cycle clears the temporary state.