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Virus and Threat Protection in the Windows Security App
Learn how to use virus and threat protection options in Windows Security to scan your device for threats and view the results.

Microsoft Support
Microsoft Support is here to help you with Microsoft products. Find how-to articles, videos, and training for Microsoft Copilot, Microsoft 365, Windows 11, Surface, and more.

Protect my PC from viruses - Microsoft Support
Learn how to protect your Windows devices and personal data from viruses, malware, or malicious attacks.

Lock or unlock specific areas of a protected worksheet
How to lock cells in Excel to protect your data. You can also unlock a range of cells and grant permissions to others to edit.

Remove a password from a document | Microsoft Support
Removing a password from a document is a simple process, but you have to know the original password. Open the document and enter its password. Go to File > Info > Protect Document > Encrypt with Password. Clear the password in the Password box, and then select OK.

Protect an Excel file | Microsoft Support
How to protect an Excel file using a password to prevent unwanted access to your data.

How to start a scan for viruses or malware in Microsoft Defender
Select Device details Select Manage in Windows Security Select Quick scan Tip If you want a deeper scan, instead of selecting Quick scan in step 3, select Scan options and choose the type of scan you want. For the most complete scan, run Microsoft Defender Offline. For more about that see Help protect my PC with Microsoft Defender Offline.

Getting started with Microsoft Defender
It includes Microsoft Defender Antivirus, an antivirus tool that helps protect you against viruses, ransomware, and other malware. For more information, see Stay protected with Windows Security.

Stay protected with the Windows Security app - Microsoft Support
Summary The Windows Security app is a comprehensive security solution integrated into Windows, designed to protect your device and data from various threats. It includes features such as Microsoft Defender Antivirus, Windows Firewall, and Smart App Control, which work together to provide real-time protection against viruses, malware, and other security threats. The app is built into Windows ...

Protect your privacy on the internet | Microsoft Support
Information is the currency of the internet. Your privacy on the internet depends on your ability to control both the amount of personal information that you provide and who has access to that information. Is your information at risk on the internet? When performing everyday online activities, you might reveal personal information that can be used by others to invade your privacy. This can ...

Installing Microsoft Defender | Microsoft Support
Protect your Android, iPhone, Mac, and Windows devices from threats by installing Microsoft Defender. Download Microsoft Defender on your devices either by: Scanning the following QR code Searching for Microsoft Defender in your app store Sharing with your devices, the following link: Copy link We encourage you to install Microsoft Defender on at least five devices per person. Ready to give it ...