Change from a 32-bit version to a 64-bit version or vice versa. Activate Windows. Fix Bluetooth problems in Windows. Learn how to install, reinstall, or activate Microsoft 365 or Office 2019 on a PC or Mac.

Troubleshoot mobile apps on Windows. Privacy with Windows Subsystem for Android™ and Amazon Appstore. Learn how to use and install mobile apps on your Windows 11 PC with the Windows Subsystem for Android™.

If some Windows functions aren't working or Windows crashes, use the System File Checker to scan Windows and restore your files. Though the steps below might look complicated at first glance, just follow them in order, step-by-step, and we’ll try to get you back on track.

您的目录数据（姓名、注册日期和电子邮件）可能会显示给管理员以及您所在组织的其他服务用户。 当您使用 Microsoft Teams （免费版）的社交功能时，您所在组织的其他最终用户可能会看到您的某些活动。

Check the Xbox services, games, and apps for any service outages.

Save attachments in new Outlook. To save the attachment, click the dropdown arrow and select Download or Save to OneDrive. Click Download to save one attachment to your computer or cloud storage location.

如果你是 Xbox Game Pass Ultimate 或 PC Game Pass 会员，则需要关联你的 Xbox 和 EA 帐户，并确保已安装了 EA 应用（Beta 版本），才能在电脑上享受 EA Play 游戏。. 如果还没有执行以上两步操作，则 Windows 版 Xbox 应用将会指导你完成设置过程。. 如果你已在 Xbox 主机上玩过 ...

Xbox Support offers help for Xbox, Game Pass, and billing questions. Get advice and customer service in the Xbox Support community.

Get help with Outlook for Windows, the Outlook app, Outlook.com, and more. Find training videos, how-to articles, and Outlook support content.

Fix Outlook.com email sync issues, including sign-in problems. Troubleshoot Outlook.com email issues that trigger a "delivery failed" error. Troubleshoot known issues with shared calendars in Outlook. Reconnect my Outlook 2016 or Outlook 2013 account to Outlook.com.