Get security info and tips about threat prevention, detection, and troubleshooting. Including tech support scams, phishing, and malware.

Learn how to tell if your Office software is genuine. To help determine if your Microsoft software is genuine, go to our How to Tell site for more information. Here you'll learn about authentic packaging, including what to look for with product key labels, and Certificate of Authenticity (COA), how to report counterfeit software, and find out what your shopping and licensing options are.

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Choose from a variety of Surface devices and accessories to get help.

Advanced email security. As a Microsoft 365 subscriber, you get enhanced security tools that help protect your inbox from phishing and malware.

Important: Reactions are only available to individuals using a work or school account in Outlook with a qualifying Microsoft 365 subscription.

Where your best groups chat. GroupMe is the easy way to connect with all the groups in your life, big and small. With apps on iOS, Android, and Web, GroupMe keeps you connected with the people most important to you.

Select Review activity to check for any unusual sign-in attempts on the Recent activity page.If you see account activity that you're sure wasn't yours, let us know and we can help secure your account—if it's in the Unusual activity section, you can expand the activity and select This wasn't me.If it's in the Recent activity section, you can expand the activity and select Secure your account.

如何在 Microsoft Edge 中停止网站通知. 可以通过以下方式删除或阻止单个网站的通知： 在 Edge 设置中删除或阻止通知

转到“付款和账单”，并选择“支付选项”。 在“付款方式”下面，可以选择“添加新的付款方式”、“查看或编辑信用卡”，或“删除信用卡”。 输入更新的信息，然后选择“保存”。除非看到更多提示，否则已完成操作。 如果这不起作用，请联系你的银行或付款提供商，以验证你的付款信息。