How to Turn on Windows Defender Again

When I browse through forums I ofttimes find this question asked many times – I am unable to turn on Windows Defender manually or Windows Defender won't or will non turn on and first in Windows 11, Windows 10, Windows 8, or Windows 7. If you face up this outcome, and then this post may assist y'all.

Tin can't turn on Windows Defender in Windows 11/10

If you are unable to start Windows Defender, then one of these suggestions is sure to help you:

1. Cheque if y'all accept some other security software installed
2. Bank check the appointment or fourth dimension on your PC
3. Run Windows Update
4. Cheque Net Zone settings
5. Cheque Grouping Policy setting
6. Check Registry setting
7. Check the condition of Service
8. Browse PC with portable antivirus software
9. Check the value of AllowUserUIAccess.

Let united states of america see the suggestions in particular.

i] Check if you have another security software installed

One of the virtually common behaviors of Windows Defender is that if it detects a 3rd-party antivirus software, then Windows Defender will close itself off. Windows is designed to detect the presence of security software installed, and we often get to run into the notification in the Action Middle. One of the common problems we have seen in the past is when thereare multiple security software installed. It often creates a disharmonize between them and in the end, it creates more trouble than doing any good. Frequent freezing, crashing to applications are some of the common issues which occur when you install more than ane antivirus software.

So to avert this situation, Windows Defender volition plough itself off when it detects another security programme. Besides, if this security awarding has a Firewall, then Windows Firewall will as well end working. So in example you want Windows Defender to piece of work, then you will take to uninstall your 3rd-party security software and reboot the system.

Ofttimes users may exist unaware if security software is indeed installed or not because when you buy a new laptop, mostly it comes with a trial version of security software like Norton, McAfee, etc. Then when you install applications like Flash or Coffee, information technology might prompt y'all to uninstall free security scanner when most of them don't notice. And then it's best to search your PC if yous're not sure if security software is installed or not. In one case it' removed you lot may need to turn it manually back on.

Blazon "Windows Defender" in the search box and then press Enter. Click Settings and make sure there is a checkmark on Plough on real-time protection recommend.

On Windows 10, open Windows Security > Virus protection and toggle the Real-Time Protection switch to On position.

two] Check the date or time on your PC

The other issue that could cause Windows Defender not to work properly is the incorrect appointment or time on your Windows automobile. Make sure yous accept set up your Windows clock & appointment set properly and then try to turn your Windows Defender back on and see if it works fine. It's strange, merely nearly of the Windows operating organization functions work, based on the system date and time. So an wrong appointment or time could trigger abnormal behavior in your Windows Bone.

iii] Run Windows Update

Another of import thing that could cause bug is, if yous Windows is not up to date, in terms of Windows Update. This could cause issues in Windows Defender or whatsoever other Windows core application. When it comes to whatsoever security software, it ever needs the latest signature updates and other Windows core updates to keep your PC secure. Then I would highly recommend running a complete Windows Update, then go into Windows Defender and run an update from there as well. And so meet if your Windows Defender is working fine.

iv] Bank check Cyberspace Zone settings

The to a higher place-discussed scenarios are the most common ones. Autonomously from these, at that place could be some small-scale bug that could affect the working of Windows Defender. It could be an incorrect Zone setting in Internet Explorer, which you can fix by resetting Internet Explorer to factory settings. Again, if y'all are using a Proxy server, Windows Defender will not exist able to update.

In such cases, you need to make some small changes to your Proxy server.

Press Windows + X and select Command Prompt (Admin)

Type in the post-obit and hitting Enter:

NETSH WINHTTP SET PROXY ane.1.1.1:8080 or NETSH WINHTTP SET PROXY MYPROXY.Net:8080

At present reboot the organisation and see if it works.

5] Check Grouping Policy setting

Open Group Policy Editor and navigate to the following setting:

Computer Configuration > Administrative Template > Windows Components > Windows Defender Antivirus.

SIn the correct pane, double-click on Turn off Windows Defender Antivirus.

Next, select Not Configured, click the Apply and OK push.

6] Bank check Registry setting

Open Registry Editor and navigate to the following setting:

HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender

Locate DisableAntiSpyware fundamental. If this central is not present, create a new and DWORD (32-bit) Value.

Set up its Value data to 0 and leave.

7] Check the condition of Service

Run services.msc to open Services Manager. Ensure that the Windows Defender service is started and set to Automatic.

8] Scan PC with portable antivirus software

Finally, it could exist a malware itself that's causing Windows Defender not to work properly. You could download and use Windows Defender Offline Tool or any other standalone antivirus software and run a complete browse.

9] Check value of AllowUserUIAccess

If nether Windows Security settings, the option for "Virus & threat protection" has disappeared, so Andrew suggests the following:

Run Registry Editor every bit Administrator and go to:

Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Policy Manager

Ready value of AllowUserUIAccess to 1.

These are some common reasons why Windows Defender does non outset.

PS: Windows Defender is turned off or not working offers some additional troubleshooting suggestions, which may also interest you lot.

Yous may also desire to check out these posts which aid troubleshoot Windows Defender issues:

1. Fault 0x800106a, Windows Defender volition not plough on
2. Windows Defender Error Code 0x800106ba: Application failed to initialize
3. Windows Defender Error: MSASCui.exe – Unable To Locate Component
4. Error 0x80070422 The Service Couldn't Exist Started in Windows Defender
5. Error 0x80508020, 0x800705b4 for Windows Defender.

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Source: https://www.thewindowsclub.com/unable-to-turn-on-windows-defender