As a way to sign every time, by using a one-time password code to increase account security. This is called two-step verification or multi-factor authentication.

Check your computer's date settings. Excel uses your computer's date system. If a cell's date isn't entered using the same date system, Excel won't recognize it as a true date.

提示: 可以使用任何电话号码来请求安全代码。. 电话号码不需要与你的帐户关联。. 手机不需要是智能手机，也不需要连接互联网，只需要能够接收短信。. 你可能需要创建新密码。 阅读有关如何创建强密码的提示。. 如果看到“该 Microsoft 帐户不存在”错误消息，请使用 Microsoft 帐户登录帮助程序。

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

有些时候，你需要检查单元格是否为空白，通常是因为你可能不希望公式没有输入值就显示结果。 此情况下，将 IF 与 ISBLANK 函数搭配使用： =IF(ISBLANK(D2),"Blank","Not Blank")

Note: If you start to play a DVD or VCD in the Player Library, the Player automatically switches to Now Playing mode. The Blu-ray Disc format is not supported in Windows Media Player. To play a Blu-ray Disc, you need to use a non-Microsoft program that supports Blu-ray playback and a device capable of reading Blu-ray Discs.

Follow the news you choose! Get the day's top news and breaking news from the industry's best sources. Stay updated on any topic you care about, from global events to your local news.

Learn how to manage extensions in Microsoft Edge, including adding, disabling, or removing them as needed.

MSN provides you with three quick ways to navigate through MSN to easily find what you need: The Mega menu located at the top left side of the page, brings you every section in just one easy step.

If you are using a mouse, select Start > Settings > Accessibility > Magnifier.Select View, and then open the Keep the mouse pointer or Keep the text cursor drop-down menu, and select how Magnifier behaves when the mouse pointer or text cursor move around the screen. This is something you should experiment with to see which combination works best for you.