Locate your product key for Windows 10 or Windows 11. Depending on how you got your copy of Windows 10 or Windows 11, you'll need either a 25-character product key or a digital license to activate it.

Learn how to run Windows Update Troubleshooter to resolve errors downloading or installing Windows updates.

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

The Xbox app on PC relies on two Microsoft accounts: the Microsoft Store account, and the Xbox account (your PC gaming account). The Microsoft Store account provides access to owned games, subscription benefits, and other Xbox app purchases made by that account.

Learn about the recovery options in Windows. Find out how to reset your PC, go back to a previous version of Windows, or use media to reinstall Windows.

See how to install programs on Windows 10 from a CD or DVD, from the internet, or from Microsoft Store.

什麼是 Xbox Game Pass 主機版？. 每個月只要一點點費用，您即可享受超過上百個絕佳的 Xbox 遊戲，包括專為 Xbox 360 與第一代 Xbox 打造的遊戲。. Game Pas s訂閱可在 Xbox Series X|S、Xbox One 和您的行動裝置上使用。. Xbox Game Pass Ultimate 適用於主機、行動裝置和電腦，並包含 ...

Report a scam. If you feel like you’ve been the target of a technical support scam, you can help Microsoft stop cybercriminals by reporting it. Learn more about avoiding technical support scams.

If you need to reinstall Office, select the version you want to install and follow those steps: Microsoft 365, Office 2019, Office 2016, Office 2013, Office 2010, or Office 2007. How to uninstall Office automatically.

For technical support, go to Contact Microsoft Support, enter your problem and select Get Help. If you still need help, select Contact Support to be routed to the best support option. Learn how to manage your Microsoft account security info and troubleshoot verification code issues.