365 Live account holders use the Windows login page at Windows.com by Microsoft for recovery, background screen changer, history, and screen error types.
A top priority is account security on the software and gives protection against unauthorized use of the services.
Windows and Live are tied through 365 for a single sign on process at https://login.live.com/login.srf and you enter a email address and password to sign in on your system.
Problems with your Windows login not working can be fixed through the recovery tool at https://account.live.com/ResetPassword.aspx by following the prompts and resetting your account password. The online recovery service is faster when this happens. Limited support is available at 1-800-642-7676 for recovery and you may have to seek help from a third party vendor.
Common requests inside the account after entering the Windows login page are for the screen changes on backgrounds, viewing history, and types of screen errors one might receive.
Desktop, laptop, and mobile all can be synced to use the same sign in credentials and access the software downloads, apps, games, or email. Personalization over how your operating system looks is done by choosing the modern background or the classic screen changes. More information about these topics are found in our resources section.
One email address is used as your login instead of the traditional username and password of the past. You can use any email that you already have or register for a new 365 account on Microsoft Live. Setup is free on 365 or use a email you already have established like Outlook, Gmail, or Yahoo.
A PC sign in running the new Windows operating system will prompt you at the screen to enter your email address and password. Syncing of important data will follow from cloud storage, photos, contacts and settings. Every person using the computer is advised to have their own Windows login and not a shared account.
http://windows.microsoft.com/en-us/windows/support
http://windows.microsoft.com/en-us/windows-live/account-security-password-information
http://windows.microsoft.com/en-us/windows-live/account-reset-password-forgot-faq