Contact Microsoft Support. Find solutions to common problems, or get help from a support agent.

Find out how to fix sound or audio problems in Windows.

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

Learn how to install Windows 11, including the recommended option of visiting the Windows Update page in Settings.

How to open PC Health Check. In Windows, use Search on the taskbar to search for “PC Health Check,” then select it from the list of results. If a PC Health Check update is available, you can quickly install it for the latest version. If you don't have PC Health Check installed, you can install it by going to https://aka.ms ...

准备好安装了吗？ 在开始之前，请确保电脑或 Mac 满足 系统要求。 如果你已兑换产品密钥，只需重新安装应用，或者知道你已通过工作或学校分配了许可证，则可以跳到登录部分 ，下载并安装 Microsoft 365 或 Office。但是，如果是 首次 安装 Microsoft 365 或 Office，可能需要先执行一些步骤。

Learn how to update drivers in Windows using Device Manager to update or reinstall a driver.

Find out how to back up your apps, files, photos, and preferences on your Windows PC with File History and other tools.

Learn how to create installation media for installing or reinstalling Windows 7, Windows 8.1, or Windows 10.

登录到已安装 Office 应用的方式取决于你的设备。 提示: 若要将电子邮件帐户添加到 Outlook 或获取登录 Outlook.com 的帮助，请参阅 Outlook 帮助 & 学习。 选择你的设备以获取更详细的登录步骤 ...