languila

Am new to the forum. I have a galaxy 2.3 petrol . My central lock works fine except for the boot which need to be open with the key which happen recently . Before it worked fine. Few days ago locked the car when I came back the windows lowered by themselves . Also when I lock the car the theft alarm just go off by itself . I was sleeping at 1 am I could hear the alarm of my car . Help needed please.