My modem has a 2.4ghz and 5ghz wifi. I use the 5ghz when I play PC games because the 2.4 gets interference from others in the apartment complex. Yesterday the wifi went out and when it came back on my PC will not detect it. I know my adapter can use it because it was the day before. Also I have tried adding it through hidden and it says it already exists. Tried updating adapter drivers. Tried restarting pc and modem multiple times. Not sure why it wont appear.