Learn how to activate Microsoft 365 or a non-subscription version of Office on your device. Find troubleshooting tips for common activation errors and product keys.

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 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 find your BitLocker recovery key, a 48-digit number needed to unlock an encrypted drive in Windows. The recovery key can be attached to your Microsoft account, work or school account, printout, or USB flash drive.

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 how to use Microsoft Defender to check your device for viruses or 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 download and use the Office offline installer to install Microsoft 365, Office 2021, Office 2019, or Office 2016 on your PC. Follow the steps for your plan and activate Office after installation.

Learn how to activate Windows 11 using a digital license or a 25-character product key. Find out how to check your activation status, link your Microsoft account, and troubleshoot activation issues.

Learn how to switch the default search engine in Microsoft Edge to any site that uses OpenSearch technology. Follow the steps to select your preferred search engine from the menu or add a new one.

Learn how to find and use the POP, IMAP, and SMTP settings for your Outlook.com account. You can also enable POP or IMAP access, troubleshoot connection errors, and get help from the Outlook.com community.