Scam! Windows Defender Prevented Malicious Software – What Should I do?

Can’t Remove Windows Defender Prevented Malicious Software pop-ups?

Have you had to deal with tech support scams before? If not, you’re in for quite a nasty surprise. Check out today’s article to learn how you can regain control over your infected computer. Yes, there is an infection on board. Something is causing the “Windows Defender Prevented Malicious Software” pop-ups. And, that is precisely the program you have to uninstall. There is a silver lining, though. You’re stuck with one relatively easy to tackle type of virus. That is if you take action immediately. The more time a parasite of any kind spends on your device, the more worrisome it becomes. For instance, this intruder may serve as a back door to malware and compromise your PC further. It could also result in some serious privacy issues so don’t overlook the danger. There is no reason for you to be tolerating this parasite. Get rid of it instead. How does hackers’ scheme work? As mentioned already, that is a classic tech support scam. Once the virus slithers itself onto your device, it starts displaying fake Windows messages. Supposedly, you have an “unrecognized and malicious software on your computer”. In reality, you only have some potentially unwanted application to worry about. Keep that in mind and do not allow the parasite to mess with you. Giving into your worry or anxiety may cost you a hefty sum of money. According to the pop-ups, you have to enter your Windows product key. The problem is, you may not be having it. In this case, the pop-ups demand that you dial a certain phone number. Can you see the scam already? Not only do hackers get access to your private data but they also trick you into calling them. It goes without saying that the number provided won’t contact you with technicians. You’ll contact the parasite’s greedy developers who are trying to steal your money. That is why it’s an absolute must to avoid the 1-877-360-0485 number. Hackers will attempt to sell you some useless anti-malware programs. That’s how you fall straight into their fraud. Instead of complying, restrain yourself from dialing anything. You have a virus on board; the sooner you delete it, the better. Its “Windows Defender Prevented Malicious Software” pop-ups are quite persistent and obnoxious. Remember, they are also fake. Contacting hackers even jeopardizes your privacy as it reveals personal data. For example, bank account details. Hackers are the last people who should be having access to such information. Hence, tackle the virus ASAP. You won’t regret it.

remove Windows Defender Prevented Malicious Software

How did I get infected with?

There are many effective virus distribution methods. That only makes it harder to determine how the virus managed to get to you. Next time you browse the Internet, pay attention. To put it mildly, the Web is infested with potential parasites. None of them should be underestimated so be cautious. Avoid illegitimate websites and/or unverified programs. Third-party pop-ups may turn out to be harmful as well. One notoriously popular technique involves freeware and shareware bundles. It is just as simple as it sounds. Hacker just cannot miss the fact most PC users skip installation steps. If you download some program bundle, you should always watch out for intruders. You may spot a nasty bonus parasite attached to the bundle. You may also spot a whole pile of vicious parasites. Do you still think rushing the installation would be a good move? Don’t be gullible. You may compromise your very own safety that way. To prevent malware infiltration, opt for the Custom/Advanced option in the Setup Wizard. In addition, check out the Terms and Conditions or EULA (End User License Agreement). It is a much better choice to take your time now than having to remove a virus later on. Thus, we would strongly recommend that you keep an eye out for cyber parasites.

Why are these ads dangerous?

The “Windows Defender Prevented Malicious Software” pop-ups try to scare you into giving your money away. What is the solution to that? You ignore the parasite’s fake messages and alerts. To be honest, the pop-ups appear to be rather legitimate. Crooks even add some deceptive links and use the Windows logo. This is all part of the fraud. Tech support scams are indeed problematic. It would only take one wrong move to both lose money and put your privacy in danger. Hackers will not hesitate before they sell your details to third parties. If you’re especially unlucky, their trick could result in identity theft. To prevent such a terrifying scenario, delete the pesky intruder right away. Please follow our detailed manual removal guide. You will find it down below.

How Can I Remove Windows Defender Prevented Malicious Software Pop-ups?

If you perform exactly the steps below you should be able to remove the infection. Please, follow the procedures in the exact order. Please, consider to print this guide or have another computer at your disposal. You will NOT need any USB sticks or CDs.

STEP 1: Uninstall suspicious software from your Add\Remove Programs

STEP 2: Delete unknown add-ons from Chrome, Firefox or IE

STEP 3: Permanently Remove Windows Defender Prevented Malicious Software from the windows registry.

STEP 1 : Uninstall unknown programs from Your Computer

Simultaneously press the Windows Logo Button and then “R” to open the Run Command

Type “Appwiz.cpl

Locate the any unknown program and click on uninstall/change. To facilitate the search you can sort the programs by date. review the most recent installed programs first. In general you should remove all unknown programs.

STEP 2 : Remove add-ons and extensions from Chrome, Firefox or IE

Remove from Google Chrome

  • In the Main Menu, select Tools—> Extensions
  • Remove any unknown extension by clicking on the little recycle bin
  • If you are not able to delete the extension then navigate to C:\Users\”computer name“\AppData\Local\Google\Chrome\User Data\Default\Extensions\and review the folders one by one.
  • Reset Google Chrome by Deleting the current user to make sure nothing is left behind

  • If you are using the latest chrome version you need to do the following
  • go to settings – Add person

  • choose a preferred name.


  • then go back and remove person 1
  • Chrome should be malware free now

Remove from Mozilla Firefox

  • Open Firefox
  • Press simultaneously Ctrl+Shift+A
  • Disable and remove any unknown add on
  • Open the Firefox’s Help Menu


  • Then Troubleshoot information
  • Click on Reset Firefox

Remove from Internet Explorer

  • Open IE
  • On the Upper Right Corner Click on the Gear Icon
  • Go to Toolbars and Extensions
  • Disable any suspicious extension.
  • If the disable button is gray, you need to go to your Windows Registry and delete the corresponding CLSID
  • On the Upper Right Corner of Internet Explorer Click on the Gear Icon.
  • Click on Internet options


  • Select the Advanced tab and click on Reset.


  • Check the “Delete Personal Settings Tab” and then Reset


  • Close IE

Permanently Remove Windows Defender Prevented Malicious Software Leftovers

To make sure manual removal is successful, we recommend to use a free scanner of any professional antimalware program to identify any registry leftovers or temporary files.

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