Stay Protected With Windows Security : Microsoft Defender Antivirus & More

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(If you are using Windows 10 build 1703 and higher, please consult  the following page )

This document is divided into the following sections:

Windows 10 has built-in real-time antivirus. It automatically runs in the background, ensuring all users have a baseline level of antivirus protection.

If you”ve used MS System Center Endpoint Protection (SCEP) on Windows 7 or Windows 8, this is the same product. It was just renamed to “Windows Defender” and integrated into Windows itself.

Automatic Updates

As Windows Defender is centrally managed, all virus definition updates will be automatically applied on the device. These updates are installed like any other system updates and no system reboot is required.

Automatic Scans

Like other anti-malware applications, Windows Defender automatically runs in the background, scanning files when they are accessed and before user open them.

When a malware is detected, Windows Defender inform you. It won”t ask you what you want to do with the malicious software it finds. The malware is automatically removed or put in quarantine. A “Malware detected” notification saying “Windows Defender is taking action to clean detected malware” or “Detected threats are being cleaned.”

These notifications will appear in the notification Center.



Configuration Settings

Windows Defender settings are now integrated into Windows 10″s new Settings app. These client settings are centrally managed at Depending on which policies settings your Windows 10 received (Centrally managed or Locally managed), yo will be able to modify or not some of these settings.

To access these settings, open the Start menu and select Settings. Choose the “Update & security” category and select Windows Defender.

By default, Windows Defender automatically enables the real-time protection, cloud-based protection, and sample submission. Real-time protection ensures Windows Defender automatically finds malware by scanning the system in real time.

For all centrally managed PCs, the real-time protection cannot be disabled.



In some circumstances (ie: performance reasons), it is possible to disable it for a short period of time but Windows Defender will automatically re-enable this setting to keep the device safe later. Cloud-based protection and sample submission allow Windows Defender to share information about threats and the actual malware files it detects with Microsoft Malware Protection Center (MMPC).

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Exclusions lists

By default, and for all centrally managed PCs, the exclusion list is managed centrally. For locally managed PCs, local admins can set Exclusions for specific files, folders, file types, and processes. If the antivirus is dramatically slowing down a certain application you know is safe by scanning it, this can speed things up again. Be careful when you use exclusions. The security on your Windows 10 could be reduced because the exclusions tell Windows Defender not to look in certain places.




How to perform Manual Scans ?

Open Windows Defender by clicking the Start button. In the search box, type Defender, and then, in the list of results, click Windows Defender to access the Windows Defender interface. If you already used SCEP, you will recognize the interface.



Windows Defender offers the following scans options :

Quick scan,Full system scan,Custom scan of specific folders.

Windows Defender scans everything in the background anyway, and there”s even a scheduled task in Windows that automatically scans the computer on a regular basis.

A malware is detected

When a malware is detected, Windows Defender blocks the object which contains this malware and put it in the quarantined area.

All the blocked malware are monitored via the following steps :

Click the “use Windows Defender” link in the Settings app to access Windows Defender, and then click over to the History tab. Click “View details” to view detected malware. You can see the name of the malware and when it was found and quarantined.

From this tab, user can remove the malware to delete it entirely from the device or allow the “malicious” file to run. This action is strongly not recommended and user should only do this if he is absolutely sure the detected malware is a false positive. Please contact the Service Desk If you have a doubt.

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I want to install another Antivirus

As Windows Defender is centrally managed, we strongly not recommend to install another Antivirus.

Why ? Windows 10 will automatically disable Windows Defender if you install another anti-malware program. It won”t continue performing real-time scans, so it won”t interfere with your other antivirus. Try to open the Windows Defender settings pane with another antivirus installed and you”ll find every option grayed out. Click the “Use Windows Defender” link and you”ll be informed Windows Defender has been disabled. Windows Defender will pop-up and say “This app has been turned off and isn”t monitoring your computer.”

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