<p>I can't sign in with a different account (with stackexchange). Somebody before me used my computer to sign in to their account (with stackexchange)...and now whenver I try to log out and then log in with my own account, it doesn't work. I click log out and then try to sign in with my own account but it automatically opens up the other person's account. So how is it possible to change this? </p>

<p>Thanks in advance. </p>
