[chuff me dizzy]

Right can anyone help me? got new phone today ,and got free tablet with it ,Daughter put me TIBB on it ,trying it out i got my account locked because I couldnt remember my password, done new one now, so thats sorted ,But if I go on the tablet and post on here ,when I came back to computer just now I had to log in ?Ive never had to log in as I have it saved ,as only me uses this computer ,do I have to log in everytime ? Thanks