What is System Defender

System Defender (a.k.a System Defender Security Center, Windows System Defender) is a money extortioner program disguised as robust security software. It pretends itself to be a real virus-detecting piece, however, instead of searching for genuine threats it intentionally fabricates scanning results to obscure the vision of inexperienced users and impose, that their computers need urgent recovery because of fake malware. Thus, it is attributed to potentially unwanted applications (PUA) and rogue scanners. In fact, the so-called infection might not have any traces on your computer at all. It is just a regular trick to compel users into purchasing a full version that will vigorously delete all of the threats. Externally, it is a regular malware detecting tool, that has no outstanding traits. Of course, it has a user-friendly and minimalistic interface to distract your attention and start displaying its stark performance as soon as possible. The main purpose is not to keep your PC safe but to tantalize you into switching to the paid version that will just clear a randomly generated list of malware. In addition, it can also pressure the computer’s RAM and CPU. And you never know whether it can gather personal data and hand it over to third parties which can be disastrous for your identity. If you find yourself using this malicious program, we strongly recommend you to uninstall it by reading the attached guide in the article below.

system defender

How System Defender infected your computer

The number one and most notorious way that virus developers tend to abuse is the bogus e-mail newsletter categorized as spam. Malefactors promote malicious content via attached files and other potentially dangerous links alongside e-mails. The range of file types may vary from executable files to PDFs and other text documents that may hide imperative threats like Trojans, Viruses, Ransomware, Spyware, Adware and somesuch. Scammers pretend themselves as some legitimate company services attempting to notify you about fake updates and other sorts of tools. The fact that they do not know about your preferences and activity has to draw you back. Although, some users adore tempting their fate and fall into this trap because of curiosity and unawareness. Spam diffusion has been the easiest and still best way to beguile raw users like elders who trust everything they see across the web. Besides that, Frauds infiltrate computers by paying other developers to mask their applications under “Advanced” and “Custom” sections in repacks. It then leads to a stealthy installation without the user’s consent. Cybercriminals invent brand new ways to catch their victims each day. This is why it is so vital to be cautious on the internet to not coincidentally enrich somebody’s pockets. Here is a set of robust actions you can do to entirely uninstall System Defender from your computer.

Download System Defender Removal Tool

Download Removal Tool

compatible with microsoft

To remove System Defender from Windows completely, we recommend you to use Norton Antivirus from Symantec. It detects and removes all files, folders and registry keys of System Defender and several millions of other adware, hijackers, toolbars.

Alternative Removal Tool

Download SpyHunter 5

To remove System Defender from Windows completely, we recommend you to use SpyHunter 5 from EnigmaSoft Limited. It detects and removes all files, folders and registry keys of System Defender and several millions of other adware, hijackers, toolbars. The trial version of SpyHunter 5 offers virus scan and 1-time removal for FREE.

Remove System Defender manually for free

Here is a manual step-by-step tutorial for full System Defender removal from your computer. This works 99% and was checked with the latest versions of System Defender installer on operating systems with the latest updates and browser versions.

Remove System Defender from Control Panel

To start removing System Defender you should remove it using Control Panel. It should uninstall correctly, however, we recommend you to use IObit Uninstaller to clean leftover items after uninstalling. Here are instructions for Windows XP, Windows 7 and Windows 8.

Remove System Defender from Windows XP:

  1. Click on Start button.
  2. Choose Control Panel.
  3. Click Add or Remove Programs.
  4. Find System Defender.
  5. Click Uninstall.

Remove System Defender from Windows 7:

  1. Click Start button.
  2. Then go to Control Panel.
  3. Click Uninstall a Program.
  4. Find System Defender and click Uninstall.

Remove System Defender from Windows 8:

  1. Hover mouse pointer to the bottom-right corner to see Menu.
  2. Click Search.
  3. After that click Apps.
  4. Then Control Panel.
  5. Click Uninstall a Program under Programs.
  6. Find System Defender, click Uninstall.

Remove System Defender from Windows 10:

There are 2 ways to uninstall System Defender from Windows 10

Way one
  1. Click on the Start button.
  2. In opened menu choose Settings.
  3. Click on the System tile.
  4. Click Apps & features and locate System Defender in the list.
  5. Click on it and then click Uninstall button near it.
Way two (classic)
  1. Right-click on the Start button.
  2. In opened menu choose Programs and Features.
  3. Locate System Defender in the list.
  4. Click on it and then click Uninstall button above.

Cannot uninstall System Defender

In some cases, System Defender won’t uninstall and gives you message, that “You do not have sufficient access to uninstall System Defender. Please, contact your system administrator” when you try to remove it from Control Panel or “Access denied” error when removing System Defender folder and files. This happens, because file wtc.exe or service does not allow you to do it. In this case I will recommend you to use SpyHunter 5 or Malwarebytes or uninstall System Defender in Safe Mode. To boot in Safe Mode do the following:

  1. Reboot your computer.
  2. While it starts booting press F8 button.
  3. This will open Advanced Boot Options menu.
  4. Choose Safe Mode and wait until Windows loads.
  5. Go to Control Panel > Uninstall a program and remove System Defender

>> See detailed instructions and video tutorial on how to boot in Safe Mode

System Defender files:


System Defender folders:


System Defender registry keys:


How to block ads and pop-ups, offering to download System Defender

As System Defender is mostly distributed via special ads and pop-ups promising to fix windows errors or remove viruses, a good way to avoid installation of System Defender is to block such ads in browsers. There are a couple of programs that have such functions. We recommend you to use AdGuard to remove ads by System Defender from browsers. Download free trial here:

Download AdGuard

Get best internet security to protect from threats, like System Defender, in the future

One of the most famous and reputable security programs for Windows is SpyHunter 5. Advanced algorithms and large databases help SpyHunter detect and remove various types of threats. Get complete protection from ransomware, adware, spyware, trojans, viruses and potentially unwanted program (PUPs), like System Defender, with SpyHunter 5. Download it here:

Download SpyHunter 5
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James Kramer
Hello, I'm James. My website Bugsfighter.com, a culmination of a decade's journey in the realms of computer troubleshooting, software testing, and development. My mission here is to offer you comprehensive, yet user-friendly guides across a spectrum of topics in this niche. Should you encounter any challenges with the software or the methodologies I endorse, please know that I am readily accessible for assistance. For any inquiries or further communication, feel free to reach out through the 'Contacts' page. Your journey towards seamless computing starts here


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