Microsoft Defender is a new security app that helps protect you and your family across all your devices; Windows, Android, Mac, and iOS.

Learn how to open and run DxDiag.exe on Windows to collect device information and troubleshoot DirectX sound and video issues.

Learn how the Photos app for Windows lets you view photos and videos from your PC alongside those from OneDrive, and keeps them organized by date, album, or folder.

Get the steps for changing your home page in Microsoft Edge, Internet Explorer 11, Google Chrome, Firefox, and Safari.

Learn how to upgrade Windows 10 Home to Windows 10 Pro to access more advanced security and networking features.

Download the latest Windows update from the Windows Update page in Settings for your device when it becomes available.

Learn why it's important to have a backup, and how Windows Backup can help you keep your files and settings safe.

Outlook.com、Hotmail、Live、または MSN のメール アカウントにサインインできない場合、サインインまたはサインアウトする方法がわからない場合は、次の解決方法を試してみてください。

Create a recovery drive so you can reinstall Windows 10 or Windows 11 in case you experience a major issue such as hardware failure.

Learn how to update Microsoft Office on PC and troubleshooting tips for installing Office updates.