Windows Defender for Windows 10
Instructions to enable Windows Defender on your Windows 10 computer.

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How to Turn on Windows Defender for Windows 10

To start Windows Defender, you have to open the Control panel and Windows Defender Settings and click on Turn On, and ensure that the following are enabled and set to On position:

1. Real-time protection

2. Cloud-based protection.

 

When there is no security software protecting your computer, you will see notifications like these appear.

Instruction screen shot 


Clicking on it will show you the installed security apps on your system. If you miss this notification, you can see it in the Notification & Action Center.

Instruction screen shot

 


Clicking on it too will show you the installed security apps on your computer, as follows.

 Instruction screen shot


Select Windows Defender and then click on the Turn on button. Windows Defender will start. The first think you want to do when this happens, is to update your definitions.

 Instruction screen shot

 

 Clicking on the Settings link in the top right corner will open the following panel. You can also access it via Settings > Update & security > Windows Defender.

 Instruction screen shot

 

Once here, ensure that Real-time protection and Cloud-based protection is set to On. You may also set Automatic sample submission to the On position. You may then configure Windows Defender according to your needs.

From Microsoft

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