Ensure that your laptop's wireless network adapter supports 5GHz frequencies. Some older or budget laptops might only support 2.4GHz. Check if your wireless network adapter driver is up to date. Visit the manufacturer's website or use the device manager on your laptop to update the driver. Make sure that your router is broadcasting a 5GHz signal. Check your router settings, and if it's a dual-band router, ensure that both 2.4GHz and 5GHz bands are enabled.