Product activation for Windows – online & support telephone numbers
Learn how to activate Windows using an internet connection, automated system, or live support advocate.
SUM function - Microsoft Support
How to use the SUM function in Excel to add individual values, cell references, ranges, or a mix of all three.
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 open Registry Editor in Windows 10 - Microsoft Support
There are two ways to open Registry Editor in Windows 10: In the search box on the taskbar, type regedit, then select Registry Editor (Desktop app) from the results.
Windows PC のバックアップ - Microsoft サポート
Windows PC でアプリ、設定、ファイル、写真、Microsoft Edge のお気に入りとユーザー設定をバックアップする方法について説明します。
Check your network connection status - Microsoft Support
Windows 10 lets you quickly check your network connection status. And if you're having trouble with your connection, you can run the Network troubleshooter to try and fix it.
Join a meeting in Microsoft Teams - Microsoft Support
Learn how to join a Microsoft Teams meeting by link, calendar, channel, chat, or by calling in.
Applies To:
Microsoft Teams
Create a form with Microsoft Forms - Microsoft Support
Learn how to create survey forms with Microsoft Forms and easily share them with students, parents, and colleagues.
Applies To:
Excel for the web, OneNote for the web, OneDrive (work or school), Microsoft Forms
Track my Microsoft Rewards orders - Microsoft Support
Sign in to account.microsoft.com, then select Order History on your Rewards page.
Change the email address or phone number for your Microsoft account
Learn how to change the email address or phone number that’s associated with your Microsoft account.
Getting ready for the Windows 11 upgrade - Microsoft Support
Learn how to get ready for the Windows 11 upgrade, from making sure your device can run Windows 11 to backing up your files and installing Windows 11.