Important: If your Microsoft cloud storage is full, you cannot send or receive email.Messages sent to you while your storage was full are bounced back to the sender and are unrecoverable. Check your mailbox storage to see what's taking up space. Learn more about recent changes.

Find help and how-to articles for Windows operating systems. Get support for Windows and learn about installation, updates, privacy, security and more.

The full path (including the file name) is too long. The path must contain fewer than 442 characters. Shorten the name of your file or the name of subfolders in OneDrive, or select a subfolder that's closer to the top-level folder, and then try to upload the file again.

Follow these steps to automatically diagnose and repair Windows security problems by turning on UAC, DEP protection, Windows Firewall, and other Windows security options and features.

When you start a focus session, a focus timer will appear on screen. To use additional focus tools in the Clock app, expand the focus timer to get the full view of the Clock app.

You'll be prompted to verify your identity. Choose whether to receive the code through email, text, or an authenticator app. Once you have the code, enter it in the text box.

无论是通过 Xbox 主机设备或还是仅通过计算机提供，这些数字游戏购买退款条款涵盖 Microsoft Store 的数字游戏优惠、Xbox 应用（不含电影和电视应用）、数字游戏捆绑优惠以及数字耐用和消费性游戏优惠，例如游戏季票、虚拟货币和微交易等（总称“数字游戏产品”）。

Contact Microsoft Support. What's new. Surface Pro; Surface Laptop; Surface Laptop Studio 2

How to maximize battery health. Like all batteries, lithium-ion cells are consumables that age and lose capacity over time and with usage. The best way to extend battery life and performance on devices that don't support smart charging is to drain the battery below 50 percent several times a week before recharging rather than discharging it on frequent short and shallow discharge cycles.

Note: Diagnostic data may contain "personal data" as defined by Article 4 of the European GDPR, but it doesn't contain your name, your email address, or any content from your files.All diagnostic data Microsoft collects during the use of Microsoft 365 applications and services is pseudonymized, as defined in ISO/IEC 19944-1:2020, section 8.3.3.