Learn why you received a notification about unusual activity in your account and what to do next.

Learn how the service process for Microsoft Surface works and how to request service online if your Surface needs repair.

Get more information about managing your Xbox subscriptions, issues with billing, and more.

Considerations for common performance issues with Office Add-ins and Macros in Office. If you create macros or Office add-ins, you'll want to review this article. Tips for optimizing performance obstructions. More tips on how to improve Excel's calculation performance, including with User Defined Functions (UDFs) for VBA.

Check spelling in a message, or set the Always check spelling before sending option to check spelling automatically.

These steps can help resolve the most common issues when you receive an Excel not responding error, Excel hangs or freezes when you launch it, or open an Excel workbook.

Support for Windows 8.1 will end on January 10, 2023. Learn what it means for you and how to move to a supported version of Windows.

With Excel for the web running in your web browser, you can: Share your workbook with others and collaborate on the same file at the same time.

Learn how to fix Outlook add-in warnings, dismiss add-in notifications, or disable an unhealthy add-in.

Using pages is a great way to share ideas using images, Excel, Word and PowerPoint documents, video, and more.You can create and publish pages quickly and easily, and they look great on any device.