It's been weeks now. My mac has forgotten everything. Some stuff just pop ups, and then I have to approve it or not. Stuff like if I give some program permission to do something. And then it always forget the password to wi-fi. Everytime I restart it or it goes on sleep mode, it asks for the password. And today I can't even get on the net because it has forgotten the ip-address. It all began after I restarted my mac normally, as usual. Someone who know what is wrong, and tell me what to do?