Unable to send or receive messages for the Hotmail account

Split from this thread.

I receive this message when trying to send and receive emails:

Unable to send or receive messages for the Hotmail account.

Server Error:  0x80048849

Server:  'https://mail.services.live.com/DeltaSync_v2.0.0/Sync.aspx'

Windows Live Mail Error ID:  0x80048849

Sometimes it is also 0x80048820

I read the threads above and just tried the ipconfig/flushdns and that didn't work.  Any other ideas?

Thanks  Pat Cox