WiFi Troubleshooting Guide
1.   Restart router and device
2.   Forget and reconnect to the network
3.   Check if other devices are affected
4.   Run 'ipconfig /release' and 'ipconfig /renew' (Windows)
5.   Switch between 2.4GHz and 5GHz
6.   Change DNS to 8.8.8.8 / 1.1.1.1
7.   Update network drivers
8.   Reset network settings