Sign in with Microsoft
Sign in or create an account.
Hello,
Select a different account.
You have multiple accounts
Choose the account you want to sign in with.
Update Windows - Microsoft Support
Update Windows. In Windows 11, you decide when and how to get the latest updates to keep your device running smoothly and securely. To manage your options and see available updates, select Check for Windows updates. Or select Start > Settings > Windows Update . Here's some other info you might be looking for:
Windows Update Troubleshooter - Microsoft Support
Learn how to run Windows Update Troubleshooter to resolve errors downloading or installing Windows updates.
Microsoft Support
Microsoft support is here to help you with Microsoft products. Find how-to articles, videos, and training for Microsoft Copilot, Microsoft 365, Windows, Surface, and more
Get help with Outlook.com - Microsoft Support
To get support in Outlook.com, click here or select Help on the menu bar and enter your query. If the self-help doesn't solve your problem, scroll down to Still need help? and select Yes. To contact us in Outlook.com, you'll need to sign in. If you can't sign in, click here .
Applies To: Outlook.com
检查你的 DirectX 版本 - Microsoft 支持
若要使用 DirectX 诊断工具 检查你电脑上使用的是哪个版本的 DirectX,请选择 “开始” 按钮,在搜索框中键入 “dxdiag” ,然后按 Enter 。. 在 DirectX 诊断工具 中,选择 “系统” 标签页,然后在 “系统信息” 下面检查 DirectX 版本号。. 你首次使用 DirectX 诊断工具 ...
VLOOKUP function - Microsoft Support
Argument name. Description. lookup_value (required). The value you want to look up. The value you want to look up must be in the first column of the range of cells you specify in the table_array argument. For example, if table-array spans cells B2:D7, then your lookup_value must be in column B.. Lookup_value can be a value or a reference to a cell.. table_array (required)
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 use multiple monitors in Windows - Microsoft Support
Choose a display option. To change what shows on your displays, press Windows logo key + P. Here's what you can choose. See things on one display only. See the same thing on all your displays. See your desktop across multiple screens. When you have displays extended, you can move items between the two screens.
在 Microsoft Edge 中添加、关闭或删除扩展 - Microsoft 支持
从 Microsoft Edge 中删除扩展. 若要删除任何扩展,请选择以下方法之一:. 在 Microsoft Edge 中,选择并按住(或右键单击)要删除(浏览器地址栏右侧)的扩展图标。. 选择“ 从 Microsoft Edge 中删除 ”>“ 删除 ”。. 在浏览器地址栏的右侧,选择“ 扩展 ”,然后选择 ...
更改桌面背景图像 - Microsoft 支持
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: 如果无法选择 “Windows 聚焦 ...
在 Excel 中将 IF 与 AND、OR 和 NOT 函数配合使用 - Microsoft 支持
在 Excel 中将 IF 与 AND、OR 和 NOT 函数配合使用. 在 Excel 中,IF 函数允许通过测试某个条件并返回结果(如果该条件为 True 或 False),在值和预期值之间进行逻辑比较。. 但如果需要测试多个条件,例如我们假设所有条件都需要为 True 或 False ( AND ),或只有一个条件 ...
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, Excel Web App, Excel for Windows Phone 10