Protect your Android, iPhone, Mac, and Windows devices from threats by installing Microsoft Defender. Download Microsoft Defender on your devices either by: Scanning the following QR code Searching for Microsoft Defender in your app store Sharing with your devices, the following link: Copy link We encourage you to install Microsoft Defender on at least five devices per person. Ready to give it ...

Find out what to do when you receive a “Call us overprotective” message when signing in to Xbox.com.

Contact Microsoft Support. Find solutions to common problems, or get help from a support agent.

If you suspect that your device may have malware you should have Microsoft Defender run a scan. Here's how to do that on Windows, Mac, or Android.

全部展開 將安全性資訊新增至您現有的 Microsoft 帳戶 建立您的 Microsoft 帳戶時新增安全性資訊

A phishing email is an email that appears legitimate but is actually an attempt to get your personal information or steal your money. Some deceptive emails appear to be from a safe sender but, in fact, have a "spoofed" source address to fool you. Here are some ways to deal with phishing and spoofing scams in Outlook.com. Spoof intelligence in Exchange Online Protection helps prevent phishing ...

If you get an email from Microsoft account team and the email address domain is @accountprotection.microsoft.com, it is safe to trust the message and open it. Microsoft uses this domain to send email notifications about your Microsoft account. These notifications can include security codes for two-step verification and account update information, such as password changes. You can check the ...

了解如何添加安全信息以便保护你的 Microsoft 帐户。

Learn how to replace out of date security info to help protect your Microsoft account.

Whenever you sign in to your Microsoft account, you may also get sign-in approval notifications in the Outlook mobile app. You will see sign-in requests appear either on the lock screen or in the Outlook mobile app. You'll also be able to get one-time passcodes, which you can copy/paste into other sign-in screens.