I've been asked for a security code when I tried to access my @live.com account.  Received one, entered it and got an error message saying the code was not valid.  Tried for a second one, same problem.  Used the chat support.  They were not able to help me and wanted to escalate.  At one point I was able to access my account.... They did not understand how come and give me a link to post here about this issue as I am afraid I will have that login problem again