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 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.

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.

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

Tech support scams adapt and persist in 2021, per new Microsoft research. How to spot a "fake order" scam. Microsoft security help & learning. Learn how to protect your PC, identity, and data from tech support scams.

To get help and troubleshoot other Microsoft products and services, enter your problem here . Post questions, follow discussions and share your knowledge in the Outlook.com Community. For additional support, see How to get support for Outlook.com. Get help with using mail, calendar, and contacts on Outlook.com.

Follow these steps to reset your Microsoft account password. If you know the email address that you used to set up your Microsoft account (which is used to sign in to your Xbox profile), you can reset your password now: Go to Reset your password and enter your email address.

Windows Security provides built-in security options to help protect your device from malicious software attacks. To access the features described below, tap the Windows Start button, type windows security, select it from the results, and then select Device security.

Microsoft Teams （免费版）. 微软在线订购协议 . 本 Microsoft Teams （免 费版 ） 微 软 在线 订 购 协 议 是 您代 表 的 实 体与 （ 以 下 简 称 “ 微 软 ” 、 “ 我们 ” 或 “ 我 们的 ” ） 之 间达 成 的 协 议 ， 或者如果您未指定与订购或续签相关的实体，则本协议是 Microsoft Operations Pte Ltd. 与您个人（以 ...

Secure Boot is an important security feature designed to prevent malicious software from loading when your PC starts up (boots). Most modern PCs are capable of Secure Boot, but in some instances, there may be settings that cause the PC to appear to not be capable of Secure Boot.