32-bit and 64-bit Windows: Frequently asked questions
To install a 64-bit version of Windows, you need a CPU that's capable of running a 64-bit version of Windows. The benefits of using a 64-bit operating system are most apparent when you have a large amount of random access memory (RAM) installed on your computer, typically 4 GB of RAM or more.
Account help
Microsoft account help and support. Get help with signing in, locked or compromised accounts, linked accounts, closing, reopening, and updating your security info and account profile.
使用している Office のバージョンを確認する方法 - Microsoft サポート
注: [アカウント] が表示されない場合、または既にファイルまたはドキュメントを開いている場合は、メニューから [ファイル] を選び、左側の一覧から [アカウント] または [サポート] を選択します。 [製品情報] の下に、Office 製品の名前と、場合によっては完全なバージョン番号が表示されます。
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 for Microsoft 365 for Mac, Word for Microsoft 365 for Mac, Outlook for Microsoft 365 for Mac, OneNote for Microsoft 365 for Mac, Excel 2021, Word 2021, Outlook 2021, PowerPoint 2021, Access 2021, Project Professional 2021, Project Standard 2021, Publisher 2021, Visio Professional 2021, Visio Standard 2021, Office 2021, OneNote 2021, Word 2021 for Mac, Outlook 2021 for Mac, PowerPoint 2021 for Mac, OneNote 2021 for Mac, Office 2021 for Mac, Excel 2019, Word 2019, Outlook 2019, PowerPoint 2019, Access 2019, Project Professional 2019, Project Standard 2019, Publisher 2019, Visio Professional 2019, Visio Standard 2019, Office 2019, Excel 2019 for Mac, Word 2019 for Mac, Outlook 2019 for Mac, PowerPoint 2019 for Mac, OneNote 2019 for Mac, Office 2019 for Mac, Excel 2016, Word 2016, PowerPoint 2016, Access 2016, OneNote 2016, Project Professional 2016, Project Standard 2016, Publisher 2016, Visio Professional 2016, Visio Standard 2016, Office 2016, OneNote 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 - Small Business Admin, Office 365 operated by 21Vianet - Admin, Project Online, InfoPath 2013
Microsoft Edge help & learning
Get help and support for Microsoft Edge. Find Microsoft Edge support content, how-to articles, tutorials, and more.
Change notification settings in Windows - Microsoft Support
To change notification settings for individual senders, under Get notifications from these senders, turn a notification sender either on or off—or select a sender's name and then turn on or turn off notification banners, lock screen privacy, turn notification sounds on or off, and set the priority of notifications.
Download and Install or Reinstall Office 365 or Office 2019 on a PC or Mac
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Insert a table of contents - Microsoft Support
Note: If you use a Manual Table of Contents style, Word won't use your headings to create a table of contents and won't be able to update it automatically. Instead, Word will use placeholder text to create the look of a table of contents so you can manually type each entry into the table of contents.
Applies To: Word for Microsoft 365, Word for Microsoft 365 for Mac, Word for the web, Word 2021, Word 2021 for Mac, Word 2019, Word 2019 for Mac, Word 2016
Ändern oder Zurücksetzen des Kennworts - Microsoft-Support
Wenn Sie das Kennwort ändern oder zurücksetzen möchten, das Sie für die Anmeldung bei Windows verwenden, haben Sie verschiedene Optionen. In diesem Artikel werden die verschiedenen Ansätze beschrieben, die Sie verfolgen können, unabhängig davon, ob Sie ein Microsoft-Konto oder ein lokales Konto verwenden, angemeldet sind oder auf dem Anmeldebildschirm angezeigt werden.
在 Windows 中卸载或删除应用和程序 - Microsoft 支持
可通过不同的方式删除应用和程序,因此如果找不到要查找的应用和程序,可以尝试另一个位置。 请注意,某些应用和程序内置于 Windows 中,无法卸载。
My Account portal for work or school accounts - Microsoft Support
Sign in using two-step verification or security info; Create app passwords in Security info (preview) Set up a phone call as your verification method