Why Can't I Sign Into My Hotmail Account?
Failure to sign in to Hotmail (rebranded to Outlook) is typically due to things such as entering an incorrect email address or password, typing with the Caps Lock activated, or a maintenance or outage problem. A hacker may have also gained unauthorized access to the account and changed the password.
Sign-in problems are often fixed by resetting the password. A complicated password composed of letters, numbers and symbols is recommended to prevent hackers from gaining entry to the account. If the problem persists, users can contact a Microsoft customer service representative and provide specific required information to verify ownership of the problem account.