Login help

I'm sitting here having the same problem. Super frustrated. Any help would be appreciated.

First check that the status page is indicating a problem on the site: https://support.xbox.com/en-US/xbox-live-status and that your internet connection is working
properly.

Try a different browser, avoid using ad blocker. You can change your gamertag by the current system:

https://account.xbox.com/ChangeGamertag

Or by the new system: https://social.xbox.com/en-us/changegamertag

The problem seems to be the site generating cookies that later causes this error. Just delete the cookies from the browser you are using and you are good to go.

I wish EA would get rid of this Origin crap. I created an origin account in what probably feels like a decade ago, with an email that no longer exists and a password I don't remember and to this day I still can't fix it. I'm getting tired of creating bogus
emails just to play some EA games, I shouldn't have to justify, for example, my $120 purchase with an email confirmation every time I want to play a new release. That's what it feels like anyway. Right now, I can't try out the beta and I can't play BF4 because
of an invalid email I haven't used in nearly 15 years. F U EA!

If you're using a PC or mobile device, try clearing your cookies and cache, that could be the issue.