some one logs into my fb account when im on it, can i find out who?

[nickname]

i have noticed that when im on fb, especially when im online and chat with sb, somebody logs into my account from another computer. i realized that when my chat window kept opening even when i was the one not doing that. as if sb on the other computer was curious to read my chat even before i open the chat window. can i find out who gets on my fb account while im on it?

[Emmanuel]

no

[Ron L]

i would change my password to login as soon as possible then check your computer with a virus and anti-spyware scan

[Kim G]

Yes, you can. When you go into Facebook, go to Account > Account Settings, then go down to 'account security'. There is an option for facebook to alert you when another computer or device is accessing your account. You can give your own computer a "name" so you know the difference between which is your computer and which is the unfamiliar computer.
This won't tell you "who" is accessing the account but it will tell you the computer details eg browser, approximate location, operating system.
If you don't get any alerts, then the chat box is likely an error with your own browser. Try seeing if it happens with a different browser.
Best thing to do is to change your password.

[Mark]

report to fb to change your account and change your password