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
I can't sign in to my Microsoft account - Microsoft Support
Learn how to fix problems signing into your Microsoft account. Resolve password verification, locked account, and other Microsoft account login issues.
Applies To:
Outlook 2021, Outlook 2021 for Mac, Outlook 2019, Outlook 2019 for Mac, Outlook 2016, Microsoft 365 for home, Outlook.com, GroupMe, Microsoft account dashboard, Microsoft Teams, Microsoft Teams personal, Microsoft To Do, OneDrive (home or personal), OneDrive for Mac, OneDrive for Windows, Outlook for Android, Outlook for iOS
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
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 ...
Protect yourself from tech support scams - Microsoft Support
Help Microsoft stop scammers, whether they claim to be from Microsoft or not, by reporting tech support scams at: www.microsoft.com/reportascam. You can also report unsafe websites in Microsoft Edge by selecting Settings and More > Help and Feedback > Report unsafe site when you encounter something suspicious.
Avoid and report Microsoft technical support scams
If you feel like you’ve been the target of a technical support scam, you can help Microsoft stop cybercriminals by reporting it. Learn more about avoiding technical support scams.
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.
Windows のサインイン オプションとアカウント保護 - Microsoft サポート
Windows Hello. Windows Hello を使用すると、顔、虹彩、指紋、PIN を使用して、デバイス、アプリ、オンライン サービス、ネットワークにサインインできます。. Windows デバイスでは Windows Hello の生体認証が利用可能ですが、必ず使用しなくてはいけないというわけ ...