Learn how to activate Windows using an internet connection, automated system, or live support advocate.

Learn how to change your status or availability in Microsoft Teams, set a duration for your status, and see who's online.

Learn how to create a team from scratch in Microsoft Teams with step-by-step instructions and tips for managing teams and groups.

了解如何使用设备管理器更新Windows中的驱动程序或重新安装驱动程序。

Troubleshoots and fixes common issues with security and malware prevention in Windows.

Play MP4 files in Windows 10 by right-clicking the file and choosing what application to open it with.

With Edge Chromium, you can add multiple profiles. Profiles allow multiple users to operate in a shared environment while maintaining access to their personalized browser settings, bookmarks, and extensions.

Learn how to remove malware from your PC. Use Microsoft Defender Antivirus in Windows 10 or Windows 11 to scan your PC for malware, viruses, or other threats.

Get Microsoft billing support. Find help with Microsoft Store purchases, subscriptions, refunds, payment options, and checking your order history.

Want to add a padlock to your email messages? You can use S/MIME in Outlook on the web to increase the security of messages. A digitally encrypted message can only be opened by recipients who have the correct key.