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Get Microsoft billing support. Find help with Microsoft Store purchases, subscriptions, refunds, payment options, and checking your order history.

Learn how to receive and interpret activity reports of your child's device use, including web browsing, apps and games usage, and screen time.

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Learn how to get the latest Windows updates. Find answers to FAQ about updating Windows to keep your PC up to date.

Some extensions change browser settings like your default search engine, new tab page, and other types of site data. To prevent extensions from changing the preferences you set up when you installed Microsoft Edge , the browser automatically turns off extensions that might change your preferred settings.. You can change settings for your extensions at any time.

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Discover how to boost your browsing speed and save battery life with Microsoft Edge's performance features, such as sleeping tabs and efficiency mode.

Sharing your notes is easy in OneNote for Windows 10. You can invite others to view a specific page or an entire notebook, and you can select whether notebook participants can only view or fully edit your notes.

本文介绍 Microsoft Excel 中 STDEVA 函数的公式语法和用法。. 说明. 根据样本估计标准偏差。 标准偏差可以测量值在平均值（中值）附近分布的范围大小。