You don't have to buy a new computer to get Wi-Fi 7 speeds. There are external Wi-Fi dongles, such as the Asus RT-BE58 Go or Acer Wave D7, that you can plug into an available USB port to get Wi-Fi 7 ...
The TP-Link AXE5400 Wi-Fi 6E Range Extender (RE815XE) is a fast yet affordable range extender for tackling Wi-Fi deadspots.