If the password was changed, the verification email was changed, old passwords are not remembered, and there is no 25-character recovery code, the remaining supported path is the Microsoft account sign-in helper.
- Start with the sign-in helper tool.
- It checks the account details provided and guides to the correct recovery steps.
- For hacked accounts, it may either show self-help steps or offer the chance to talk to an agent.
- If the account was compromised, first scan the PC for malware before changing or resetting anything.
- In Windows Security, open Virus and threat protection.
- Select Scan options > Full scan > Scan now.
- This reduces the risk of the attacker capturing new credentials again.
- If sign-in becomes possible, immediately change the password and review account settings.
- Check connected accounts, forwarding, and automatic replies.
- If two-step verification was enabled and there is no access to any alternate verification method and no 25-character recovery code, support cannot bypass it.
- Support agents are not allowed to send password reset links or change account details.
- If the sign-in helper does not resolve it, use the support contact path offered there.
References:
- I can't sign in to my Microsoft account | Microsoft Support
- How to recover a hacked or compromised Microsoft account | Microsoft Support
- How to get a Microsoft account recovery code | Microsoft Support
- Help with the Microsoft account recovery form | Microsoft Support
- Can I trust email from the Microsoft account team? | Microsoft Support