如果知道用户名和密码但已停止工作，请阅读 我的用户名和密码已停止工作。. 如果你忘记了 Microsoft 帐户用户名或电子邮件地址， 并且 之前已在 Microsoft 帐户上设置了其他 安全信息 ，请按照以下步骤操作。

当在新设备中首次启动 Windows 10 时，设备上已安装的防病毒保护程序即是你的默认安全应用。但是，Windows 安全中心已预安装并可随时使用。

解决安装 Windows SP1 时遇到的问题. 如果你尝试安装 SP1 并看到指示安装未成功的错误消息，这可能是因为用于安装更新的 Windows 维护服务商店出现问题，或者是因为你的防病毒软件阻止安装更新。

There are a few common scenarios in which Windows running on a PC might be discovered to be non-genuine during validation. Repairs. If your PC has been repaired, you might start to see messages on your desktop that Windows isn't genuine.

Organize your ideas. Collections help you keep track of your ideas on the web - shopping, planning a trip, research, or just want to pick up where you left off.

使用 Authenticator 作为登录的一种方式. 如果已为帐户启用无密码、双重或多重身份验证，请使用以下步骤登录：

Receive photos, videos, or other kinds of files that you or a friend shares from another device, such as a phone, laptop, or tablet. On your PC, select Start > Settings > Devices > Bluetooth & other devices. Learn how to pair.

Automatically add a signature to a message. You can create an email signature that you can add automatically to all outgoing messages or add manually to specific ones.

Better together tip: Manage drafts from Outlook for iOS and Outlook for Android. If you use Outlook for iOS or Outlook for Android, your drafts will automatically synchronize to your mobile device.From there, you can finish messages you've started at your computer, easily add attachments from your photos or camera, or use Office Lens to capture notes from a whiteboard in a meeting.

Check the Archive folder. If you've archived a message, it won't appear in your inbox. Make sure the missing message isn't in your Archive folder.If you want to move an archived message back to your inbox, select the message and then select Move to > Inbox. If you're using the Outlook for iOS or Outlook for Android apps or a mobile browser, go to the Archive folder, select the message and ...