了解如何安装 Windows 7 Service Pack 1 (SP1)。 包含有关如何获取下载、要求和其他内容的信息。 备份重要文件 在安装更新之前，最好将重要的文件、照片和视频备份到外部硬盘、U 盘或云端。

As you saw above, the DATEDIF function calculates the difference between a start date and an end date. However, instead of typing specific dates, you can also use the TODAY() function inside the formula. When you use the TODAY() function, Excel uses your computer's current date for the date.

由于此网站的设置，我们无法提供该页面的具体描述。

Select the app or game you'd like to download, and then select Get.

In the Windows emoji picker, you can either scroll through the list, use the category icons at the top or bottom of the emoji picker, or type a keyword to search for the emoji you want.

Select Add a printer or scanner.. Wait for it to find nearby scanners, then choose the one you want to use and select Add device.

PowerPoint for the web supports changing case. See the procedure below. Word for the web doesn't support changing case. Use the desktop application to open the document and change text case there, or else you can manually change the casing of text in Word for the web.

了解如何重置更改 Microsoft 帐户密码。 获取有关忘记 Microsoft 帐户密码的帮助。 重要: 如果看不到用于在何处发送代码的选项，或者你不再有权访问显示的任何验证选项，请使用此登录帮助程序工具。 如果无法识别任何验证电子邮件或电话选项，请使用此登录帮助程序工具。

Keeping Bing as your default search engine provides an enhanced search experience in the new Microsoft Edge , including direct links to Windows apps, relevant suggestions from your organization if you’re signed in with a work or school account, and instant answers to questions about Windows.However, you can change the default search engine to any site that uses OpenSearch technology.

If you can't find a file on your computer or you accidently modified or deleted a file, you can restore it from a backup (if you're using Windows backup) or you can try to restore it from a previous version.Previous versions are copies of files and folders that Windows automatically saves as part of a restore point.