Find your Windows product key - Microsoft Support
Generally, if you bought a physical copy of Windows, the product key should be on a label or card inside the box that Windows came in. If Windows came preinstalled on your PC, the product key should appear on a sticker on your device. If you’ve lost or can’t find the product key, contact the manufacturer. To ensure your product key is ...
Applies To:
Microsoft account dashboard
安装 Windows 7 Service Pack 1 (SP1) - Microsoft 支持
安装 Windows 7 Service Pack 1 (SP1) Windows 7 支持已于 2020 年 1 月 14 日结束。. 我们建议你转到 Windows 11 电脑来继续从 Microsoft 接收安全更新。. 获取 SP1的推荐（并且最简单）方法是在“控制面板”中的“Windows 更新”中打开自动更新，然后等待 Windows 7 通知你 SP1 已准备 ...
添加字体 - Microsoft 支持
下面是安装或管理字体的两种方法：. 所有字体都存储在 C:\Windows\Fonts 文件夹中。. （可选）只需将字体文件从提取的文件文件夹拖动到此文件夹中即可添加字体。. 然后，Windows 会自动安装它们。. 若要查看字体的外观，请打开“字体”文件夹，右键单击字体文件 ...
Applies To:
Word 2013
OneDrive に格納されている以前のバージョンのファイルを復元する
個人の Microsoft アカウントまたは職場または学校アカウントでOneDrive にサインインします。. 以前のバージョンに復元するファイル (一度に復元できるファイルは 1 つだけ) を選択し、右クリックして [ バージョン履歴] を選択します。. 注: クラシック ビュー ...
Applies To:
OneDrive for Business, SharePoint Server Subscription Edition, SharePoint Server 2019, SharePoint Server 2016, SharePoint Server 2013 Enterprise, OneDrive (work or school), OneDrive (home or personal), OneDrive for Mac, OneDrive for Windows
KB2986423-修正：當資料列大小超過允許大小上限時，需要花很長的時間將新資料行新增至資料表
原因. 發生這個問題的原因是，當列的總大小接近允許的最大列大小時，SQL Server 會對資料表進行完整的掃描，以確保新增的欄不會違反資料完整性。. SQL Server 2012 之前的版本不會執行這項檢查，這會讓資料定義語言（DDL）執行得更快。. 不過，如果列大小超過 ...
Update drivers manually in Windows - Microsoft Support
In the search box on the taskbar, enter device manager, then select Device Manager. Select a category to see names of devices, then right-click (or press and hold) the one you’d like to update. Select Search automatically for updated driver software. Select Update Driver. If Windows doesn't find a new driver, you can try looking for one on ...
Turn off, disable, or uninstall OneDrive - Microsoft Support
Select the OneDrive cloud in your notification area to show the OneDrive pop-up. Select the OneDrive Help and Settings icon then select Settings. Go to the Account tab. Select Unlink this PC. macOS. Click the OneDrive cloud icon up in your Menu bar, click the three dots to open the menu, and select Preferences. Go to the Account tab.
Applies To:
OneDrive for Business, SharePoint Server Subscription Edition, SharePoint Server 2019, SharePoint in Microsoft 365, Office for business, Microsoft 365 admin, OneDrive (work or school), OneDrive (home or personal), OneDrive (work or school) operated by 21Vianet, OneDrive for Mac, OneDrive for Windows, SharePoint admin center, SharePoint in Microsoft 365 Small Business, SharePoint operated by 21Vianet
Uninstall or remove apps and programs in Windows
Select Start > All apps and search for the app in the list shown. Press and hold (or right-click) on the app, then select Uninstall. Uninstall in Settings. Select Start > Settings > Apps > Apps & features . Find the app you want to remove, select More > Uninstall. Note: Some apps can't be uninstalled from the Settings app right now.
VLOOKUP 函数 - Microsoft 支持
例如，=VLOOKUP("Fontan?",B2:E7,2,FALSE) 将使用最后一个字母搜索 Fontana 的所有实例，该实例可能有所不同。 请确保您的数据中不包含错误的字符。 在第一列中搜索文本值时，请确保第一列中的数据没有前导空格、尾部空格、直引号（' 或 "）与弯引号（‘或“）不一致 ...
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
SUMIF function - Microsoft Support
If you want, you can apply the criteria to one range and sum the corresponding values in a different range. For example, the formula =SUMIF(B2:B5, "John", C2:C5) sums only the values in the range C2:C5, where the corresponding cells in the range B2:B5 equal "John." To sum cells based on multiple criteria, see SUMIFS function.
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