Sign in using Microsoft Authenticator Microsoft Authenticator helps you sign in to your accounts if you've forgotten your password, use two-step verification or multi-factor authentication, or have gone passwordless on your account.

玩家代號系統詳細數據 如果這是您第一次變更玩家代號，您可以免費變更一次。 不論您第一次註冊 Xbox 時，我們是否自動為您建立 Xbox， (表示您並未自行) 選擇它，或是在註冊時建立自己的玩家代號。

Learn how to find a Windows product key for activation, and when you'll use a digital license instead.

在 Xbox 上購物時，收到錯誤訊息或錯誤碼嗎？ 了解它們代表的意義。

Learn how to activate Windows using a product key or digital license, check your activation status, and link your Microsoft account.

骨骼骨骼疾病和重复性劳损 重要 如果出现持续或周期性的不适、疼痛、悸动、酸痛、刺痛、麻木、烧灼感或僵硬，不要忽视这些警告信号。 即使这些症状不是在玩视频游戏时出现的，也要立即咨询有资质的健康专家。 此类症状可能与神经、肌肉、肌腱、血管和身体其他部位的疼痛有关，但有时也 ...

Download Microsoft Authenticator Microsoft Authenticator is a mobile app that helps you sign in to all your accounts without using a password.

Find out what to do when you receive a “Call us overprotective” message when signing in to Xbox.com.

How to create or edit your Outlook signature for email messages. Include your signature, text, images, electronic business card, and logo.

Find out how to change your Xbox gamertag through a browser, on your Xbox console, or your Windows device.