Fixing Windows Can't Connect to This Network Wi-Fi Error

The 'Windows can't connect to this network' error typically means the stored wireless profile is corrupt. The fix is to forget the network and reconnect. Click the Wi-Fi icon in the taskbar, click the arrow next to the network, and select Forget. Then reconnect by selecting the network and entering the password. If that doesn't work, run the network troubleshooter (Settings > System > Troubleshoot > Internet Connections) and try the Winsock/IP reset commands: in an elevated command prompt, run 'netsh winsock reset' and 'netsh int ip reset', then reboot. For corporate networks using 802.1X authentication, the issue may be an expired certificate or changed RADIUS settings. Check with the network admin. Updating the wireless adapter driver (Device Manager > Network Adapters) often resolves persistent connection failures on laptops with Intel or Realtek adapters.