Before installing drivers, check if your device is actually being recognized:
Correct. The RTL8188CU is 2.4 GHz only. It does not support 5 GHz bands or 802.11ac. If you need 5 GHz, upgrade to a modern chipset (e.g., Realtek RTL8812AU). Before installing drivers, check if your device is
Realtek Official Site (via their legacy driver package): Correct