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Update Surface devices and Windows. Download the latest drivers and firmware updates to keep your Surface devices performing their best.

Find out how to fix sound or audio problems in Windows.

Learn how to find and change settings in Windows. Find your Windows settings in a snap! Select the Start button, then select Settings .From there, browse the categories or use search to find what you're looking for.

Learn how to install, reinstall, or activate Microsoft 365 or Office 2019 on a PC or Mac.

Applies To: Office 2021, Office 2021 for Mac, Office 2019, Office 2019 for Mac, Microsoft 365 for home, Office for business, Office 365 Small Business, Microsoft 365 admin, Office 365 operated by 21Vianet, Office 365 operated by 21Vianet - Admin, Microsoft 365 for Mac, Office 365 Germany - Enterprise, Office 365 Germany - Enterprise admin

Get free Windows themes from Microsoft to personalize background, colors and sounds for your PC.

Learn how to install Windows 11, including the recommended option of visiting the Windows Update page in Settings.

Learn how to switch out of S mode to install apps from outside of the Microsoft Store or to upgrade to Windows 11.

Learn how to change your Windows desktop background (wallpaper) and accent color using personalization settings.

查找 Windows 7 或 Windows 8.1 的产品密钥. 卸载或重新安装 Windows 7 或 Windows 8.1 时，通常需要产品密钥。通常，如果购买的是实物 Windows 拷贝，产品密钥应该在标签上或者在 Windows 随附包装盒中的卡上。

Applies To: Microsoft account dashboard

Learn how to change your account picture in Windows. Choose from pictures on your PC or take a new selfie.