If not, you may need the services of a PC hardware technician to replace the inbuilt WiFi adapter or you can opt for a USB Wireless Adapter Dongle you can attach via USB port on your computer.
You can use PC HelpSoft Driver Updater to do it in 3 easy steps: If you’re dealing with slow WiFi on your laptop ... a professional who can recommend the best Wi-Fi adapter for your laptop. In summary ...