Updates to the default screen and sleep settings now help you use energy more efficiently and extend battery life. You can find efficiency settings in Windows 11 at Settings > System > Power & battery.. For a guided walkthrough of how each of the power and battery settings can improve your device's performance, click the button to open the Get Help app:

Learn about the recovery options in Windows. Find out how to reset your PC, go back to a previous version of Windows, or use media to reinstall Windows.

To download the offline installer for Internet Explorer 11, choose your language and system below.

使用 vlookup、hlookup 和其他函数（如 index 和 match）根据您输入的值搜索和查找数据。 本文将让您快速回顾 vlookup，然后链接到更多内容。

Learn how to access the Control Panel in Windows for managing your system settings and programs.

Create an ISO file for Windows 10. Unlike in previous versions of Windows, you’ll need to use the media creation tool to create an ISO file to install Windows 10.

Learn how to find your Windows product key for activation or when to use a digital license instead.

Learn how to install, reinstall, or activate Microsoft 365 or Office 2019 on a PC or Mac.

Learn how to troubleshoot problems updating Windows. Find answers to common questions and issues installing Windows updates.

Excel の表に基づいたドロップダウン リストを編集する. ソースの一覧を Excel の表として設定する場合、一覧からアイテムを追加または削除するだけで、自動的に関連するドロップダウンが更新されます。. 項目を追加する場合は、一覧の最後に移動して、新しい項目を入力します。