Microsoft prioritizes account security and works to prevent people from signing in without your permission. When we notice a sign-in attempt from a new location or device, we help protect the account by sending you an email message and an SMS alert. If your phone number or email changes, it's important to promptly update the security contact info on the Security basics page so we can work with ...

Find out the minimum amount of time your Xbox Series X|S console, controllers, and accessories will receive security updates.

Download Microsoft Authenticator Microsoft Authenticator is a mobile app that helps you sign in to all your accounts without using a password.

If you tried to sign in with your Microsoft account and you received a message that said: "Your security info change is still pending" or "You can't access this site right now" It's because all the security info (such as alternate contact methods) that you previously added to your account was removed and replaced with new info. You need to wait 30-days for the changes to take effect.

Applies to: Windows Server 2019 This security update includes fixes and quality improvements that are part of the following update: February 10, 2026—KB5075904 (OS Build 17763.8389) The following is a summary of the issues that this update addresses when you install this update. The bold text within the brackets indicates the item or area of the change we are documenting. [Windows System ...

This article has guidance for: Organizations (enterprise, small business, and education) with IT-managed Windows devices and updates. Note: If you are an individual who owns a personal Windows device, please go to the article Windows devices for home users, businesses, and schools with Microsoft-managed updates.

In this article Introduction Summary Generic Secure Boot events (1032 to 1800) Device specific events (1795 to 1808) Change log Introduction To help keep Windows devices secure, Microsoft maintains several Secure Boot related components, including the Secure Boot signature databases (DB and DBX), the key exchange key (KEK), and the Windows boot manager. Windows applies updates to these ...

How to manage Kerberos KDC usage of RC4 for service account ticket issuance changes related to CVE-2026-20833

This security update provides the latest changes for the Windows Security app. The update is composed of the Windows Security app and its underlying service. This update applies to only Windows 11 devices (build 22000 or later) To determine the current running version of the Windows Security app, run the following PowerShell command: Get-AppPackage Microsoft.SecHealthUI Windows Security ...

Why is my Microsoft account temporarily suspended? Microsoft accounts are usually locked if the account holder has violated our Microsoft Services Agreement. Here are some common reasons why accounts are locked, though not all account locks occur for these reasons: Malware, phishing, and other harmful activities Microsoft forbids the use of our services for: Malware: Sending intentionally ...