Learn how to create a USB flash drive or DVD to install or reinstall Windows 11, 10, 8.1, or 7. You'll need a reliable internet connection, a blank storage device, and a product key (if applicable).

Learn how to download and install Microsoft 365 or Office 2019, 2016, or 2013 on your PC or Mac. Find out how to activate Office, troubleshoot issues, and switch languages or bit versions.

Learn how to locate your 48-digit BitLocker recovery key when you need to unlock an encrypted drive in Windows. The key can be attached to your Microsoft account, work or school account, printout, or USB flash drive.

Learn how to use Microsoft Defender to check your device for malware on Windows, Android, or Mac. Find out the signs of infection, the types of scans, and how to run Microsoft Defender Offline for a deeper scan.

Learn how to diagnose and fix errors in your Outlook mail profile that might prevent you from receiving email. Follow the steps for Outlook 2016 or use the Microsoft Support and Recovery Assistant tool.

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Learn how to download and install or reinstall Microsoft 365 or Office 2021 on a PC or Mac. Find out the system requirements, product keys, activation steps, and troubleshooting tips.

Learn where to enter your product key for different versions of Office or Microsoft 365, and how to install or reinstall Office after redemption. Find tips for troubleshooting product key issues and contacting support.

Learn how to view and manage the sign-in history of your Microsoft account for the last 30 days. Find out how to change your password, update security settings, and contact support if you need help.

Find the POP, IMAP, or SMTP settings for your Outlook.com account to add it to Outlook or another mail app. Learn how to enable POP or IMAP access, troubleshoot connection errors, and get help from Microsoft.