I have 4 @msn.com email accounts that I access through Windows Live mail.  Starting yesterday, May 9, 2014, I get an error message for 2 of them: 

Unable to send or receive messages for the Msn (xxxxxxx) account.

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

BUT ONLY 2 OF THEM!  It looks like there are issues with the same 2 account in Outlook.  Anyone have any ideas to resolve these issues?  I have read & tried several solutions that have been offered, but nothing has worked yet.