I keep unchecking the box to automatically log me into yahoo and lo and behold i'm automatically logged in

Question

i keep unchecking the box to automatically log me into yahoo and lo and behold i'm automatically logged in anyway. how can i put a stop to this. i'm a student who uses several computers throughout the day and if i forget to shut one down, all a person coming behind me has to do is click on your mail button and they're logged onto my e-mail account. i don't like it

Answer 1

you have to delete the "cookie"

Answer 2

Go to your IM and change the auto log on feature there as well.

Answer 3

Delete your cookies.

my Computer,  C Drive,  Documents and Settings, The User, My recent documents, cookies folder and delete.