I can't sign I into my account

(๑ˆ◡ˆ๑)ﾉнёιιο,

I'm sorry about the sign in issues. There is currently a
Service Alertout right now for our Xbox Live Core services.
The error code 0x8a4001a is usually what most will see. Another error message is
"There was a problem please try again later."

There are many posting to remove and redownload your profile, as this has helped a few you can try this step.
Although, being the service alert is for signing in there are some who are
unable to re-download profile after removing it. We suggest just waiting it out keep checking the service status. Also, there is way to get notified once there's an update with the Service alert.

If you decide to try the removal of the profile and not sure how to do so here is a link for it. As well as there is a link on how to Power cycle your console.

• Add and remove profile
  
• Power cycle console
  

Hope this helps.

Hello, Hobbes! My name is Mario and I welcome you to the Microsoft Xbox Community!

I can understand your concern and please don't worry I am here to help you.

Could you kindly tell me what device or console are you currently using?

Please keep in mind that this is a public forum. I am an Xbox gamer like you and I am happy to help you with my knowledge. Unfortunately, I am unable to access your internal account information.

In this situation, I would advise that you take a look over the
compromised Account troubleshooter just in case. Seeing that you're seeing an unknown Xbox in your my devices for your account. You should definitely change your accounts password after removing access to all devices currently associated with your Microsoft
account.

Glad to hear it. For future reference, every time you make a change to your gamertag (email, password, etc) you need to redownload it via the BC menu

Hi! I'm Rostom, an Independent Advisor. I will be glad to help you here.

When did this issue start to occur? Are you able to navigate through your System Settings to perform a factory reset?