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When you get a new device and start up Windows 10 for the first time, the antivirus protection that comes installed with the device is your default security app.

Note: If you forgot your account info and had to reset your security info, you must wait 60 days before closing your account.

To increase security and performance, Windows 11 in S mode only runs apps from the Microsoft Store. If you want to install an app that isn't available in the Microsoft Store, or if you have Windows 10 Pro, Enterprise, or Education and want to upgrade to Windows 11, you'll need to permanently switch out of S mode.

Microsoft generally releases the MSRT on a monthly cadence as part of Windows Update or as a standalone tool. (For exceptions, see Skipped releases.)Use this tool to find and remove specific prevalent threats and reverse the changes that they made (see Covered malware families).For comprehensive malware detection and removal, consider using Windows Defender Offline or Microsoft Safety Scanner.

Windows Security provides built-in security options to help protect your device from malicious software attacks. To access the features described below, tap the Windows Start button, type windows security, select it from the results, and then select Device security.

Notes: If you don't see Go to Microsoft Store on the Activation page, contact your organization's support person.. If you made a substantial hardware changes to your device (such as replacing the motherboard) and you have a valid product key, try to activate Windows by phone.

The recommended (and easiest) way to get SP1 is to turn on automatic updating in Windows Update in Control Panel and wait for Windows 7 to notify you that SP1 is ready to install.

Find your product key to activate Windows. A product key is a 25-character code that's used to activate Windows and helps verify that Windows hasn't been used on more PCs than the Microsoft Software License Terms allow.

Microsoft support is here to help you with Microsoft products. Find how-to articles, videos, and training for Microsoft Copilot, Microsoft 365, Windows, Surface, and more.