If you can't sign into your Microsoft account, most issues can be identified by our sign-in helper tool. The tool will ask you to enter the email address or mobile phone number you're trying to sign in with and check the details you provide.

Microsoft Copilot is an AI-powered digital assistant designed to help users with a range of tasks and activities on their devices. It can create drafts of content, suggest different ways to word something you've written, suggest and insert images, create PowerPoint presentations from your Word documents and many other helpful things.

Helping users safely navigate web, app, and game content is one of Microsoft’s top priorities. If you live in a region that requires permission to create an account and access Microsoft services, you may be prompted to request or give parental consent.

Under Microsoft Defender Firewall, switch the setting to On.If your device is connected to a network, network policy settings might prevent you from completing these steps. For more info, contact your administrator.

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.

Press and hold (or right-click) the MP4 file you want to play, select Open with, and then choose your preferred file player from the list of applications.

Locate the device that you want to check the warranty on, then select Info & support.

PIN 是用户定义的一组数字或数字和字母的组合，可用于登录 Windows 设备，而不是密码。 你的 PIN 安全地存储在你的设备上，它不会在任何地方传输，也不会存储在服务器上。 这使得它比传统密码更安全。 如果要更改 PIN，或需要重置 PIN，可以使用不同的选项。

Important: You don't need to remove old security information unless there is an account security risk (e.g. someone else has access to your old mailbox).

For a black screen, use the following keyboard shortcut: Windows logo key + Ctrl + Shift + B.