Learn how to change the power mode on your Windows PC to preserve your battery, limit notifications, and background activity.

查找有关 Windows 操作系统的帮助和操作方法文章。 获取对 Windows 的支持，并了解安装、更新、隐私、安全等方面的信息。

Summary Startup Repair is a built-in Windows recovery tool that helps fix issues preventing the operating system from starting. It runs from the Windows Recovery Environment (WinRE) and automatically diagnoses and repairs common startup problems such as corrupted system files or boot configuration errors. Users can access it through Advanced startup options or when Windows fails to boot. It is ...

If your purchase of Office or Microsoft 365 came with a product key, you enter your product key on one of the websites listed below for your product. After you enter your key, you can download and install Office, or you can renew your Microsoft 365 subscription. Having problems with your product key?

Help me turn file preview on or off in Outlook. Show me how to save a message as a PDF file. Open, save, and edit attachments received in Outlook

Microsoft 支持可帮助你处理 Microsoft 产品的问题。 查找有关 Microsoft Copilot、Microsoft 365、Windows 11、Surface 等的操作方法文章、视频和培训。

Découvrez comment modifier le mode d’alimentation de votre PC Windows pour préserver votre batterie, limiter les notifications et l’activité en arrière-plan.

Learn how to run Windows Update Troubleshooter to resolve errors downloading or installing Windows updates.

The Microsoft Authenticator app helps you sign into your accounts when you're using two-step verification.

Learn more about profile cards in Profile cards in Microsoft 365. Find a contact in new Outlook On the side panel, select People. Select the search box at the top of the window. Type any detail for the contact you're searching for, such as a phone number, name, company, website, or anything in their profile card.