Download and install or reinstall Microsoft 365 or Office 2021 on a PC ...
Change from a 32-bit version to a 64-bit version or vice versa. Activate Windows. Fix Bluetooth problems in Windows. Learn how to install, reinstall, or activate Microsoft 365 or Office 2019 on a PC or Mac.
Applies To:
Office 2021, Office 2021 for Mac, Office 2019, Office 2019 for Mac, Microsoft 365 for home, Office for business, Office 365 Small Business, Microsoft 365 admin, Office 365 operated by 21Vianet, Office 365 operated by 21Vianet - Admin, Microsoft 365 for Mac, Office 365 Germany - Enterprise, Office 365 Germany - Enterprise admin
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
Download and install or reinstall Office 2019, Office 2016, or Office ...
From the Overview page, select Office apps and on that page, find the Microsoft 365 product you want to install and select Install. To install Microsoft 365 in a different language, or to install the 64-bit version, use the dropdown to find more options.
Applies To:
Office 2019, Office 2016, Office 2016 for Mac, Office 2013
Use the SUM function to sum numbers in a range - Microsoft Support
You can use a simple formula to sum numbers in a range (a group of cells), but the SUM function is easier to use when you’re working with more than a few numbers. For example =SUM (A2:A6) is less likely to have typing errors than =A2+A3+A4+A5+A6.
Applies To:
Excel for Microsoft 365, Excel for the web, Excel 2021, Excel 2019, Excel 2016
Screen mirroring and projecting to your PC or wireless display
Cast to a display from a Windows PC. You can wirelessly connect your PC to a TV, projector, or other kind of external display that supports Miracast. Turn on your TV, projector, or other display. If you're using a Miracast dongle or adapter, make sure it's plugged in to the display.
Activate Windows - Microsoft Support
Learn how to activate Windows using a product key or digital license, check your activation status, and link your Microsoft account.
SharePoint にサインインする - Microsoft サポート
SharePoint にサインインする. SharePointは、次のように、Web ブラウザーを介して接続するブラウザー ベースのアプリです。. [office.com] に移動し、職場または学校アカウントにサインインします。. ウィンドウの左上隅で、 [ すべての アプリ] > > アプリ起動ツール ...
Applies To:
SharePoint in Microsoft 365
Earn points with Microsoft Rewards | Xbox Support
Earn points toward rewards by doing the stuff you do every day. It’s easy and it’s free. All you need to do is sign up, and Microsoft Rewards will be included in your Microsoft account: Microsoft Rewards. Once you’ve signed up, sign in to your Microsoft account to see your current points.
View and delete browser history in Microsoft Edge
You can view and clear your Microsoft Edge browsing history stored on a single device, across all synced devices, and in the cloud. You may choose to clear your browsing history at any time.
Contact Us - Microsoft Support
This service is free. Get help and support, whether you're shopping now or need help with a past purchase. Contact Microsoft Support. Find solutions to common problems, or get help from a support agent.