Windows 10 và 11 include Windows Security, which provides the latest antivirus protection. Your device will be actively protected from the moment you start Windows. Windows Security continually scans for malware (malicious software), viruses, and security threats. In addition to lớn this real-time protection, updates are downloaded automatically to lớn help keep your device safe and protect it from threats.

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Tip: If you"re a 365 Family or Personal subscriber you get Defender, our advanced security software for Windows, Mac, iOS, & Android, as part of your subscription. Learn more at Getting started with Defender.


Windows 10 or 11 in S mode

Some features will be a little different if you"re running Windows 10 or 11 in S mode. Because this mode is streamlined for tighter security, the Virus và threat protection area has fewer options. But don"t worry—the built-in security of this mode automatically prevents viruses và other threats from running on your device, & you"ll receive security updates automatically. For more info, see Windows 10 or 11 in S mode FAQ.

Important security info

Windows Security is built-in lớn Windows & includes an antivirus program called Defender Antivirus. (In early versions of Windows 10, Windows Security is called Windows Defender Security Center).

If you have another antivirus app installed and turned on, Defender Antivirus will turn off automatically. If you uninstall the other app, Defender Antivirus will turn back on automatically.

Understand & customize Windows Security features

Windows Security is your home to manage the tools that protect your device & your data:

To customize how your device is protected with these Windows Security features select Start  > Settings > Update & Security > Windows Security  or select the button below.Open Windows Security settings

Status icons indicate your cấp độ of safety:

Green means there aren’t any recommended actions right now.

Yellow means there is a safety recommendation for you.

Red is a warning that something needs your immediate attention.

Run a malware scan manually

If you"re worried about a specific file or thư mục on your local device, you can right-click the file or thư mục in tệp tin Explorer, then select Scan with Defender.

Tip: On Windows 11 you may have to lớn select Show more options after you right-click to lớn see the option lớn scan the tệp tin or folder.

If you suspect there"s malware or a virus on your device, you should immediately run a quick scan. 

Run a quick scan in Windows Security

Note: Because of streamlined security, this isn"t available if you"re running Windows 10 or 11 in S mode.

Under Current threats, select Quick scan (or in early versions of Windows 10, under Threat history, select Scan now).

If the scan doesn"t find any issues, but you"re still concerned, you may want to kiểm tra your device more thoroughly.

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Run an advanced scan in Windows Security

Select Start  > Settings  > Update và Security > Windows Security và then Virus & threat protection.

Under Current threats, select Scan options (or in early versions of Windows 10, under Threat history, select Run a new advanced scan).

Select one of the scan options:

Full scan (check all files & programs currently on your device)

Custom scan (scan specific files or folders)

Select Scan now.

Learn more about running an advanced scan

Schedule your own scan

Even though Windows Security is regularly scanning your device to lớn keep it safe, you can also set when and how often the scans occur.

Note: Because of streamlined security, this isn"t available if you"re running Windows 10 or 11 in S mode.

Schedule a scan

Select the Start button, type schedule tasks in the Search box, & in the menu of results, select Task Scheduler.

In the left pane, select the arrow (>) next khổng lồ Task Scheduler Library lớn expand it, vì the same with > Windows, và then scroll down & select the Windows Defender folder.

In the top-center pane, select Windows Defender Scheduled Scan. (Point to the choices khổng lồ see the full names.)

In the Actions pane on the right, scroll down and then select Properties.

In the window that opens, select the Triggers tab, and then select New.

Set your preferred time và frequency, and then select OK.

Review the schedule và select OK.

Turn Defender Antivirus real-time protection on or off

Sometimes you may need lớn briefly stop running real-time protection. While real-time protection is off, files you mở cửa or tải về won"t be scanned for threats. However, real-time protection will soon turn on automatically again to lớn protect your device.

Turn real-time protection off temporarily

Note: Because of streamlined security, this isn"t available if you"re running Windows 10 or 11 in S mode.

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