Unable to send or receive messages for the Hotmail (xxx) account.

Server Error: 0x800488EB
Server: 'https://mail.services.live.com/DeltaSync_v2.0.0/Sync.aspx'
Windows Live Mail Error ID: 0x800488EB

I have been getting this message since 09/07/14 and have tried everything that has been suggested and it is still the same

Can someone help please

Karen