Windows Security is pre-installed on Windows 10 and ready for you to use at any time.

Learn how to change the refresh rate for your display in Windows to determine how smoothly motion appears on your screen.

Learn how to troubleshoot Windows activation errors. Browse common activation errors and learn what you can do to fix them.

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

Learn how to reinstall Windows on your PC and how activation works after it's installed.

Updates to the default screen and sleep settings now help you use energy more efficiently and extend battery life. You can find efficiency settings in Windows 11 at Settings > System > Power & battery.. For a guided walkthrough of how each of the power and battery settings can improve your device's performance, click the button to open the Get Help app:

Follow these steps to temporarily turn off Defender antivirus protection in Windows Security. Keep in mind that if you do, your device may be vulnerable to threats.

In Windows 11, apps don't automatically get added to your desktop. Learn how to pin apps to your desktop or taskbar in Windows 11 or Windows 10.

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