Find your Windows product key - Microsoft Support
Locate your product key for Windows 10 or Windows 11. Depending on how you got your copy of Windows 10 or Windows 11, you'll need either a 25-character product key or a digital license to activate it.
Applies To:
Microsoft account dashboard
Windows Update Troubleshooter - Microsoft Support
If you get an error code while downloading and installing Windows updates, the Update Troubleshooter can help resolve the problem. Select Start > Settings > System > Troubleshoot > Other troubleshooters. Next, under Most frequent, select Windows Update > Run.
Multiply and divide numbers in Excel - Microsoft Support
Calculation operators and order of operations. Create a simple formula to multiply and divide in an Excel spreadsheet. You can multiply two or more numbers in one cell or multiply and divide numbers using cell references. All formulas in Excel begin with an equal sign (=).
Applies To:
Excel for Microsoft 365, Excel for Microsoft 365 for Mac, Excel for the web, Excel 2021, Excel 2021 for Mac, Excel 2019, Excel 2019 for Mac, Excel 2016
How to prevent and remove viruses and other malware
Discusses how to remove viruses, spyware, rogue software, or malware using Microsoft Security Essentials, Microsoft Safety Scanner and Microsoft Defender Offline.
Use Microsoft Bluetooth Mouse - Microsoft Support
Use Microsoft Bluetooth Mouse. Microsoft accessories. Windows 11 Windows 10. The Microsoft Bluetooth Mouse is designed to be your go-to mouse for precise scrolling and navigation. The compact design makes it easy to be productive on the go.
KB5015684: Featured update to Windows 10, version 22H2 by using an ...
The enablement package is a great option for installing a scoped feature update like Windows 10, version 22H2 as it enables an update from version 2004, 20H2, 21H1, or 21H2 to version 22H2 with a single restart, reducing update downtime. This enables devices to take advantage of new features now.
如何登录 Outlook 网页版 - Microsoft 支持
使用工作或学校帐户登录到Outlook 网页版. 转到 outlook.office.com 。. 如果未使用工作或学校帐户自动登录，请按照提示输入工作或学校帐户的电子邮件地址和密码。. 按照之前可能已为此帐户设置的任何双重身份验证提示进行操作。. 选择“ 登录 ”。. (如果已登录 ...
Applies To:
Office for business, Office 365 Small Business, Outlook on the web, Outlook on the web for Exchange Server 2016
使用 VLOOKUP、INDEX 或 MATCH 查找值 - Microsoft 支持
VLOOKUP 和 HLOOKUP 函数，以及 INDEX 和 MATCH 是 Excel 中一些最有用的函数。. 注意: Excel 中不再提供“查找向导”功能。. 下面是如何使用 VLOOKUP 的示例。. =VLOOKUP (B2,C2:E7,3,TRUE) 在此示例中，B2 是第一个 参数 ，即函数运行所需的数据元素。. VLOOKUP 第一个参数是要查找的 ...
Applies To:
Excel for Microsoft 365, Excel for the web, Excel 2021, Excel 2019, Excel 2016
查找 Windows 产品密钥 - Microsoft 支持
找到用于Windows 10或Windows 11的产品密钥. 根据获取Windows 10或Windows 11副本的方式，需要 25 个字符的产品密钥或数字许可证才能激活它。. Windows 10版本 1511) 中称为数字权利的数字许可证 (是Windows 10和Windows 11中无需输入产品密钥的激活方法。. 如果二者都不具备，则 ...
Applies To:
Microsoft account dashboard
更改桌面背景图像 - Microsoft 支持
更改桌面背景图像. 你可以选择桌面背景并随时更改它。. 选择 “开始 > 设置” > “个性化 > 背景 ”。. 在 “个性化设置背景 ”旁边的列表中，选择“ 图片 ”、“ 纯色 ”、“ 幻灯片放映 ”或“ Windows 聚焦 (”，) 查看来自世界各地的新图像。. 注意: 如果无法 ...