Why cant i log log on my yahoo account? and its correct email and password i register it right now and when i log on it says it is not a register yahoo id please register i new one and i change it pass then it cant again then i tried on my other account log in then i log on and when i got on yahoo the beta thing is pop up and i need to accept after that cant load i tried and and i lose 2 hours fixing OMG

If you gave him your password and your username for your email account or for your messenger account then he can log in to your account and change the password to one only he knows. If he can get into your email he can read all your old emails. If you use the same password for multiple accounts, he can keep guessing at what accounts you might have and try the password. Even if you have accounts that don't use the same password but use your email address to log into, he can try to log into those with your email address and say he doesn't remember your password and they'll email him a new one.
Sounds like you're screwed. Call your ISP (Internet service provider)

Do you have the correct password? Can you reset the password? I recently had an attempt to log in to my account from Japan.. You might also be able contact facebook using your registered email and have them manually reset the password for you.

Go to log on page for Yahoo Email, type in User Name, then click on "Forgot My Password", (right under User Name), they will send you your Password to the Email Account you used when you registered with Yahoo.

(If you really don't have anything in your old Yahoo Email account you wanted to save, just re-register with a different User Name).

When you a have an account with yahoo mail automatically you are sign to yahoo messenger. So you need a yahoo ID before you can enter yahoo messenger and you have you have yahoo id you will log in with your yahoo id and password. to enter yahoo messenger.

You can click on yahoo messenger icon and enter you id and password and then click sign in.

But if don't have the yahoo messenger icon, just go to yahoo and click on yahoo messenger and enter your id and password to sign in.

log on to yahoo website and enter email address you used to set up your account and click forgot password and they email you a new password to the email account you used to register with

why, you can't log in your yahoo, is either your password or user name is not correct or properly entered. So check if you enter the right password or user name to log in. Because there is no way you enter the right user name and password and you can't in.be sure of what detail you use in creating your account.

Multiple Attempts by you or someone trying to access your mail account with wrong password will freeze your account for 24 hours. however wait for few hours and try clearing the cookies and temp file and then try

I suggest you to check whether your email address and password is correct or not, by logging in at the www.yahoomail.com website, If you are able to login then your account exists and the email address and password is correct.
If it shows wrong password, try forgot password.

If you are able to login to your account in website, only you cannot login in yahoo messenger, There might be some problem in yahoo messenger, I suggest you to download the recent version of yahoo messenger and try logging in, if problem persists check your internet connectivity, Sometimes we couldn't login if there is a problem in internet connection.
There may also be problem with windows firewall settings.

And also check whether the yahoo messenger is added as exception in the windows firewall or not, If not add the yahoo messenger to exception list.

contact Yahoo! thats the only thing you can do now. sorry! =[

When you set up the account you needed another working email to register. Do you still have it? If so you can just do a password reset...