Managing personal Outlook.com account settings, security, and privacy
Hi lgartwork,
I'm sorry to hear you're experiencing this issue. How long ago did you create it? It can take up to 2 hours for the mailbox to be provisioned. (It's usually much faster though.)
If you still can't log in, try logging in using a private browser window.
To open a private browser window, right-click on the browser icon on the taskbar and choose the option for a new private or incognito window.