Today I received a message in Spanish (I do not speak Spanish) from Microsoft in one of my backup hotmail accounts containing a code to access my other hotmail account.  I promptly accessed the impacted account and changed the password.

A few hours later, I received messages in the impacted account, also in Spanish and also from Microsoft.  They are legitimate messages, it seems, and I entered them into a translation application but was unable to discern exactly what they say.  It appears that someone is attempting to gain access or has gained access to the impacted hotmail account. 

I have screenshots of the messages that I can send privately to a mod./admin.  I do not want to attach them here because they contain my email addresses, which I presume would be viewable by the public.

I should add that I just now also changed the security question on the impacted account.  In addition, I have a complete antivirus software suite on my computer, and no viruses or malware are detected.

What I would like to know is, (1) did someone gain access to my account, (2) do they still have access, and (3) how can I prevent them from gaining or maintaining access now.

Thanks very much for any assistance you are able to provide!