Hi,
Thank you for sharing your question. I understand how stressful it is when you suddenly cannot sign in and you need to use your computer right away. I’m really sorry you’re dealing with this situation. This usually happens when Microsoft detects unusual activity on the account or when the sign‑in information needs to be verified for security reasons. The best next step is to go to the Microsoft account sign‑in page and use the account recovery process, where you can request a security code or complete the recovery form if you no longer receive verification messages.
If you prefer speaking with someone, you can contact Microsoft Support through the official support website, where you can request a call‑back or chat with an agent depending on availability in your region.
May I ask if you still have access to your recovery email or phone number, or if you’ve already tried the account recovery form? Please feel free to follow up with any details so I can help guide you through the next steps.
I hope this helps.
Best Regards,
Noel