Why do I have to keep rejoining my home Wi-Fi network?

[iMore Question]

Even though I lock my settings, every time I log onto my Mac, I have to rejoin my home network.

 

[Just_Me_D]

I don't know, but go to System Preferences - Network - Wi-Fi - Advanced, and then make sure that there's a checkmark inside the box next to "Remember networks this computer has joined".