An older Windows 8 laptop often misses a new router when the router is broadcasting on a band the laptop does not support, especially 5 GHz.
Try these steps in order:
- Check the router band.
- If the router has both 2.4 GHz and 5 GHz, try connecting the laptop to the 2.4 GHz network.
- Older laptops may detect 2.4 GHz but not 5 GHz.
- Try the other Wi-Fi band.
- If both bands appear as separate networks, connect to the other one.
- This is specifically recommended when a PC cannot connect or detect the expected network.
- Update or reinstall the Wi-Fi adapter driver.
- Open Device Manager.
- Expand Network adapters.
- Right-click the Wi-Fi adapter and select Update driver.
- If that does not help, uninstall the Wi-Fi driver and restart the laptop so Windows reinstalls it.
- Check whether the network is saved incorrectly and reconnect.
- Go to Settings > Network & Internet > Wi-Fi > Manage known networks.
- If the network appears there, select it, choose Forget, then reconnect manually.
- If the network is hidden, connect manually.
- In Wi-Fi settings, choose Hidden network.
- Enter the Wi-Fi name and password exactly.
- Make sure Wi-Fi hardware is enabled.
- Some laptops have a physical Wi-Fi switch. Make sure it is turned on.
- Move closer to the router.
- This helps rule out weak signal issues during detection.
- If needed, use another connection temporarily.
- Try Ethernet if the laptop has a port, or use another trusted Wi-Fi network to confirm the laptop can still connect wirelessly.
If the laptop still sees every nearby network except the new router after trying 2.4 GHz and reinstalling the Wi-Fi driver, the most likely cause is compatibility between the older wireless adapter and the router settings.