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.

Learn about the differences between a Microsoft 365 subscription, Office 2016, and the free Office Online apps.

Need help with an Xbox console, an Xbox game, or Xbox network? Find out how to get in touch with us.

Erfahren Sie, wie Sie Office 2013 auf Ihrem PC oder Office für Mac 2011 installieren können.

但是如果是重新安装 Microsoft 365，且已兑换了产品密钥并拥有与 Microsoft 365 相关联的帐户，请转到“ 登录并安装 Office ”的部分。

Open Control Panel in Windows. Windows 10. In the search box next to Start on the taskbar, type control panel. Select Control Panel from the list of results. Note: Many Control Panel features are simpler and faster in Settings . Open Settings.

Fresh Start in Windows 10 lets you perform a clean reinstallation and update of Windows while keeping your personal data and most Windows settings intact.

Learn how to personalize a Windows lock screen with a background photo, slideshow, or app notifications.

Open Skype and click or tap Skype name, email or phone . Enter your Skype name, email or phone and select Sign in . Enter your password and select the arrow to continue. You’re now signed in to Skype. Note : Once you've signed in, Skype will remember your sign in information when you close Skype or sign out and choose to remember your account ...

Training: Get started with SharePoint in Microsoft 365. At office.com, sign in to SharePoint, then select the SharePoint tile.