text: ican open my yahoo acct to other computer,why cant i in this particular computer? i can type my id and password , but these messages keeps on appearing "ypu have been log ou because you sign in on a different conputer" what should i do? the most common cause for this issue is you've logged on another computer. when you log in from different computer, yahoo! will disconnect the session from your first computer... then once you've connected, your first computer attempts to re-connect to yahoo which will cause you to disconnect.   to solve this problem, simply log out/log off from your yahoo when you've finished using a computer.  another possible cause is someone knows your yahoo! id and password. in this case, things become ugly. immediately change your password or be prepared for losing your account.