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

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

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

Learn how to update drivers in Windows using Device Manager to update or reinstall a driver.

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

Learn how to upgrade from Windows 10 Home to Windows 10 Pro or Windows 11 Home to Windows 11 Pro, including how to use a valid product key or the Microsoft Store.

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

If you changed your hardware in order to upgrade to Windows 11 and the system is not recognizing the change in a timely manner, this article explains how to initiate the assessment manually.

Protect your Android, iPhone, Mac, and Windows devices from threats by installing Microsoft Defender. Download Microsoft Defender on your devices either by:

Learn how to troubleshoot Bluetooth problems in Windows. Resolve issues connecting a Bluetooth device or accessory.