Learn how to redeem a Microsoft gift card, Xbox download code or token, Office product key, or Windows activation code to your Microsoft account. Find troubleshooting tips and contact support if you need help.

Learn how to view and manage the sign-in history of your Microsoft account for the last 30 days. Find out how to change your password, update security settings, and contact support if you need help.

Find solutions to common problems, or get help from a support agent for various Microsoft products and services. Sign in to get personalized help and chat with a Microsoft specialist.

Xbox Game Pass Core conversion ratio: Any remaining time will convert to Xbox Game Pass Ultimate time at a ratio of 2:1 and be rounded up to the next full day.For example, 90 days remaining of Xbox Game Pass Core will convert to 45 days of Xbox Game Pass Ultimate time.

Learn how to earn Microsoft Rewards points with Xbox, whether on console or on your devices. Find out how to access the Rewards hub, complete Game Pass Quests, shop for eligible items, and redeem your points for great rewards.

如果你购买了与你的 Microsoft 帐户区域不同的 Xbox 礼品卡或代码，请务必联系零售商或 aka.ms/contactxboxsupport。

Learn how to download and install Microsoft 365 or Office 2021 on a PC or Mac with a Microsoft account, work or school account. Find out how to activate, troubleshoot, and change versions of Microsoft 365 or Office.

Learn the difference between free web apps and paid Microsoft 365 subscriptions, and compare the benefits and prices of different plans. Find out how to buy, install, and use Microsoft 365 apps on your devices.

進一步了解有關 Xbox 數位代碼和禮品卡，以及如何疑難排解兌換內容的問題。

Learn how to upgrade to Windows 11 from Windows 10 using Windows Update, Installation Assistant, or other methods. Note that some devices may not meet the minimum system requirements for Windows 11.