解决安装 Windows SP1 时遇到的问题. 如果你尝试安装 SP1 并看到指示安装未成功的错误消息，这可能是因为用于安装更新的 Windows 维护服务商店出现问题，或者是因为你的防病毒软件阻止安装更新。

There are some common two-step verification problems that seem to happen more frequently than any of us would like. We've put together this article to describe fixes for the most common problems.

If prompted, enter your password. However, if you have two-factor authentication set up, you might see a window asking you to Create an app-specific password.To obtain an app-password, do the following:

Battery Life: Lowering your refresh rate can save battery power by reducing the amount of energy your display consumes.This can be useful when you are using a laptop or tablet and want to extend your battery life.

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To change appearance, select Appearance and make the changes you want to your default theme, zoom, toolbar, and fonts.

You can use data from a Excel worksheet as the basis for a PivotTable or PivotChart. The data should be in list format, with column labels in the first row, which Excel will use for Field Names.Each cell in subsequent rows should contain data appropriate to its column heading, and you shouldn't mix data types in the same column.

Adding Emojis to your conversation. Below the message box are three buttons to help you insert content into your message. The emoji button opens menus where you can quickly search for what you want.

Download our Formulas tutorial workbook. We've put together a Get started with Formulas workbook that you can download. If you’re new to Excel, or even if you have some experience with it, you can walk through Excel’s most common formulas in this tour.

When you get a new device and start up Windows 10 for the first time, the antivirus protection that comes installed with the device is your default security app.