There are a number of possible explanations for why verification codes don't always arrive. Read through the list of the most common causes, and see if any of them apply to you, or use our troubleshooter to help guide you.

Learn how to troubleshoot and fix problems setting up your email in Outlook.

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Learn how to use antivirus protection in Windows Security to protect your Windows PC against malware, viruses, and other threats.

When you back up your files, apps, and settings in the cloud using your Microsoft account, you get 5 GB of free cloud storage and other benefits that protect your files with the latest security and make everyday tasks easier.

Discover the latest features in Office 2021, including new ways to create content, manage data, and communicate effectively.

Follow these steps to temporarily turn off Defender antivirus protection in Windows Security. Keep in mind that if you do, your device may be vulnerable to threats.

了解如何使用产品密钥或数字许可证激活 Windows、检查激活状态，以及链接Microsoft 帐户。

With Microsoft Edge, you can turn on sync to browse the web on all your devices, keep your favorites organized, and more.

Use OneDrive as a cloud backup to share your files and folders with others. Learn how to control permissions, allow editing, or set expiration dates.