WLM – Hotmail problem

I'm transitioning from an old laptop running W7 & WLM 2011 to a new one running W10 & WLM 2012. I have two email addresses, one of them is Hotmail. I set up WLM on the new laptop, signed in with my Microsoft ID, added the first email address - all is fine. Then I add the second address, the Hotmail, but I just get a message that the account is synchronising, and to check back in a few minutes - but the message just stays there indefinitely. I've also tried manually setting up the account by exporting the account details from the old laptop to a memory stick and importing it, but that doesn't help. I've tried deleting it and adding it again - no success. If I try to Send/Receive, it prompts for a password, but it doesn't accept my MS ID password. I've also received error 0x800CCC16 when trying to access it (can't remember the exact circumstances). That email address is still working fine on the old laptop. Any suggestions?