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
Check for Windows updates. Learn how to run Windows Update Troubleshooter to resolve errors downloading or installing Windows updates.
Protect yourself from tech support scams - Microsoft Support
Tech support scams are an industry-wide issue where scammers use scare tactics to trick you into unnecessary technical support services to supposedly fix device or software problems that don't exist. At best, the scammers are trying to get you to pay them to "fix" a nonexistent problem with your device or software.
获取有关数字代码或礼品卡的帮助 | Xbox Support
兑换数字代码. 所有 Xbox 数字代码长度均为 25 个字符，包括数字和字母，并且采用五组字符（每组包含五个字符）格式 (xxxxx-xxxxx-xxxxx-xxxxx-xxxxx)。. 如果你尝试在 Windows 或 Xbox 设备上兑换代码，请确保已正确输入所有 25 位数字。. 若要了解有关 Xbox 礼品卡和代码的 ...
如何兑换礼品卡和代码 | Xbox Support
兑换礼品卡和充值码以进行 Xbox 购买和延长 Xbox 订阅。. 代码的长度为 25 个字符，包括数字和字母，并且采用横竖 5 个字符的 5x5 格式。. 代码可以是你从 Microsoft 或受信任的零售商处购买的数字卡或物理卡。. 请注意，如果帐户的未结余额或付款选项不再有效 ...
Ways to install Windows 11 - Microsoft Support
Create Windows 11 installation media. On the Windows 11 software download page , select Create tool now and follow the instructions to install Windows 11. Warning: Microsoft recommends against installing Windows 11 on a device that does not meet the Windows 11 minimum system requirements.
Saving credit or debit card info in Microsoft Edge
You can save your debit or credit cards in Microsoft Edge by choosing Save when you're checking out your cart on shopping sites. By saving your card to Microsoft Edge on your current device, you can reuse the same card for checkout in the future with Microsoft Edge browser on the same device.
Applies To:
Microsoft Edge
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
Using product keys with Office - Microsoft Support
Office is prompting me for a product key. Use your Microsoft account, not your product key, to install and activate Office and individually purchased Office apps, such as Project, Visio, Word, Excel, and Outlook. Sign in to install Office. Bookmark the site below so you always know where to go to install Office.
Applies To:
Excel for Microsoft 365, Word for Microsoft 365, Outlook for Microsoft 365, PowerPoint for Microsoft 365, Access for Microsoft 365, OneNote for Microsoft 365, Publisher for Microsoft 365, Visio Plan 2, Excel 2021, Word 2021, Outlook 2021, PowerPoint 2021, Access 2021, Project Standard 2021, Publisher 2021, Visio Professional 2021, Visio Standard 2021, Office 2021, OneNote 2021, Excel 2019, Word 2019, Outlook 2019, PowerPoint 2019, Access 2019, Project Standard 2019, Publisher 2019, Visio Professional 2019, Visio Standard 2019, Office 2019, Excel 2016, Word 2016, Outlook 2016, PowerPoint 2016, OneNote 2016, Project Professional 2016, Project Standard 2016, Publisher 2016, Visio Professional 2016, Microsoft 365 for home, InfoPath 2013
获取 Windows 中的经典免费 Solitaire 游戏 - Microsoft 支持
喜欢早期 Windows 版本中的免费 Solitaire 游戏吗？. 我们已将它们全部打包在一个便利的应用中，即 Microsoft Solitaire Collection。. 在 Microsoft Store 中的“Microsoft Solitaire Collection”页面上，选择“安装”。. 游戏将自动下载并安装。. 若要启动游戏，请选择“开始”。. 你 ...