Solved: Windows Livemail - unable to send or receive Windows Live Mail Error ID: 0x80

This issue suddenly occurred today - quote :

Unable to send or receive messages for the Yahoo.co.uk (account). The connection to the server has failed.

Server: 'pop.mail.yahoo.com'
Windows Live Mail Error ID: 0x800CCC0E
Protocol: POP3
Port: 110
Secure(SSL): No
Socket Error: 10061

To be clear - I have NOT changed any mail account or server settings since I started using WIN7 and Livemail almost 4 years ago. I am able to send and receive Yahoo account mail using my iPad and using my WIN7 laptop if I access my mail account via the web.I am only unable to send/receive from laptop when trying to connect to mail server today.

I am using MS Security Essentials as my only Antivirus program and have been for at least 2 years. I do not have any other AV program installed

My outgoing mail (SMTP) server port number is set at 587 (changing to 25 has no effect)
Icoming Mail (POP3) is set at 110
Server Timeout is set at 1 minute
Outgoing mail server is checked as "requires authentication"

EDIT - Servers :
Icoming mail (POP 3) is set as pop.mail.yahoo.com
Outgoing mail (SMTP) is set as smtp.mail.yahoo.uk

These settings have not been changed since originally established and were working perfectly 2 days ago. I had not accessed mail on the laptop, which had been powered off, for 2 days.
Any ideas ?

Thanks