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

If you're making the move to a new PC, you don't have to leave behind your photos, videos, files, and folders. You can bring them all with you to your new PC using one of the following options.

了解如何在电脑上安装 Office 2013 或 Office for Mac 2011。

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

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

If you’re having sound or audio problems, the following suggestions might help. The tips are listed in order, so start with the first one, see if that helps, and then continue to the next one if it doesn’t.

Learn different ways to locate your BitLocker recovery key in Windows, and learn about how BitLocker might have been activated on your system.

Use your scanner and download an app from Microsoft Store to scan a document or picture to your PC.

Learn how to recover deleted items, such as email, contacts, calendar appointments, and tasks in Outlook.

Learn how to update Windows to ensure your device operates smoothly and securely with the latest features.