Troubleshoots and fixes common issues with security and malware prevention in Windows.

Describes how to use the clean boot process to troubleshoot a problem in Windows 8.1, Windows 8, Windows 7, or Windows Vista.

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。

See how to arrange all your open windows using the mouse, keyboard, or the Snap Assist feature in Windows.

This article describes a problem with CD or DVD drives not work, or is missing, or not recognized after installing or uninstalling programs.

See what's new in recent Windows 10 and Windows 11 updates, including a chat from the taskbar, widgets, snap groups, and more.

Find out how to manage your Xbox subscriptions to request a refund or cancel a recurring payment.

Learn how to insert data from a picture with Excel - and you can use your smartphone or tablet to take the picture. Excel's powerful AI capabilities can convert your hand written or printed data into a table.

Here are answers to some common questions about the 32-bit and 64-bit versions of Windows.

This page provides phone numbers of Microsoft customer service.