From about 3 days ago I have not been able to send or receive Emails. The following error response keeps coming up.

Unable to send or receive messages for the Btinternet (fryattje) account. An incorrect password was entered. The next time you send or receive messages, you'll be asked to enter your username and password for this account.

Server Error: 0x800CCC90
Server Response: -ERR [AUTH] (#MBR1212) Incorrect username or password.
Server: 'mail.btinternet.com'
Windows Live Mail Error ID: 0x800CCC92
Protocol: POP3
Port: 110
Secure(SSL): No

Have tried all ways to change password without any success. A friend who is very computer literate reckons I have been hacked.

Very very frustrated