How to Fix Windows 11 Wi-Fi Disconnecting (5 Proven Steps)

Quick answer

Update driver, disable power-saving on the adapter, forget + rejoin, flush DNS, change 5GHz channel.

1. Device Manager → Network adapter → Update driver
2. Power Management → uncheck “Allow computer to turn off”
3. Settings → Network → Forget → Rejoin
4. ipconfig /flushdns
5. Router: switch 5GHz to channel 36/44

FAQ

Why does it drop after sleep? Power-saving + old driver — most common in USA ISP routers.