Hi Choo,
Thank you for posting your query in Microsoft Community.
In case you are unable to login to the system with the Microsoft Account, I would suggest you to refer to the following link:
http://windows.microsoft.com/en-US/windows-live/id-support
On the other hand, there is a possibility that your Microsoft account has been compromised—or hacked—it means that someone has stolen your password and might be using your account to access your personal info or send spam.
We can help you recover your account, and help prevent it from being hacked again. Refer to the following article:
Get back into your Microsoft account if it's been blocked or hacked
Hope this information is helpful. If the issue still persists, please post back for further assistance, we'll be glad to assist you.