Two-Step Verification: Enable two-step verification (2FA) for your Microsoft account. This will provide an extra layer of security. Even if someone else gets your password, they'll be stopped if they don't have access to your security info. Here's how to set it up: https://support.microsoft.com/en-us/account-billing/turn-on-2-step-verification-for-microsoft-accounts-c7910146-672f-01e9-50a0-93b4585e7eb4
- Monitor your account: Regularly check your account's recent activity. If you see something suspicious, take steps to secure your account. Here's the link: https://account.microsoft.com/account/Account?refd=account.live.com&destrt=home-index
- Strong Password: Always use a strong password and change it regularly.
Here is a similar Quetion and reponses from Community : - https://answers.microsoft.com/en-us/windows/forum/all/multiple-unsuccessful-sign-in-attempts-on-my/e0a3fe83-ccf3-4c81-b417-e03774ac4f9d?page=2