Article by George Norman

On 22 Oct 2009

Windows System Defender – a rogue security software application from the same family of rogues that spawned Windows Enterprise Defender and Windows PC Defender – is usually distributed by specially crafted webpages such as windowssystemdefender.com. On this page the rogue is praised for being a properly good security software solution. The site says Windows System Defender will protect against viruses and spyware, will protect your IM (instant messaging) client and will use little processing power. This is all nothing but a lie meant to push you to download the software onto your machine.

The site also presents a long list of Windows System Defender features that should convince you to download the rogue:
- Fast automated updates
- Real-time protection against malicious and suspicious software
- Advanced protection against spyware and adware.
- Real-time protection against security threats when using ICQ and IM clients
- Self-protection from being modified, stopped or even uninstalled by another application
- Low CPU load
- Compatible with Windows XP, Windows Vista
- Free support 24/7 in touch.


The graph showing how efficient Windows System Defender is at detecting/removing malware is fake as well. So are the Awards it claims to have received from prestigious IT-oriented sites.

Keep in mind that Windows System Defender is a rogue. This means it cannot detect, remove and protect against malware. It also means it will try to scare you into thinking your system is infected -> then it will ask you to purchase a full version of Windows System Defender to remove the infection (assuming of course that you fell for the scam and you believed the rogue can detect and remove threats).

Don’t let the malicious advertising get to you. Windows System Defender is not a genuine, legitimate security software application. Do not download it and do not pay for it!

If you didn’t download Windows System Defender but somehow it managed to get on your computer, you should ignore the fake pop-ups, system scans and requests to purchase a full Windows System Defender version. Remove the rogue from your system as soon as possible!



Automatic removal guide
Step 1. If you have a printer, make sure to print out this tutorial. If you do not have a printer, save this tutorial, go out to a copy center and print it out there. If you do not have a printer and do not want to go out, then use the pen and paper method: grab a pen and a piece of paper and write down the instruction presented in the steps below. In the process of eliminating Windows System Defender from your machine you will need to shut down the browser. And since this will also shut down the tutorial, you need to know what you should do next.

Step 2. You will have to install Malwarebytes’ Anti-Malware. In this regard you need to download the software’s setup executable. Just click this link and save the .exe file on your computer (preferably on your desktop).

Step 3. Double click the Malwarebytes’ Anti-Malware setup executable. It should be on the desktop under the name mbam-setup. This will launch the installation process. If you already know how to install a piece of software, proceed to step 4. If you do not know how to do this, we’ll walk you though it all:



- The Select Setup Language window should have popped up. By default, the language in which the software will be installed is set to English, but you can change this. The software provides support for 30+ languages. After selecting the language of your choice, click OK. It would be best to just leave it set to English though.



- The Malwarebytes’ Anti-Malware Setup Wizard will now popup. Just click Next.



- You will be presented with the License Agreement. Click I accept the agreement and then click Next. If you do not accept the agreement you will not be able to continue.



- Keep clicking Next until you get to the Ready to install window. Now click Install. After the installation process completes click Finish. Do not uncheck the boxes next to Update Malwarebytes’ Anti-Malware or Launch Malwarebytes’ Anti-Malware.















Step 4. The Malwarebytes’ Anti-Malware application will launch automatically. The Perform quick scan option should be checked by default – if it isn’t then check it and then click Scan. You are well advised to close all running apps before clicking scan. This will ensure the scan for Windows System Defender will complete swiftly.



Malwarebytes’ Anti-Malware will start scanning your files for signs of Windows System Defender. This may take a while, so be patient. It all depends on how powerful your computer is and how many files Malwarebytes’ Anti-Malware has to scan.



When the scan for Windows System Defender is complete you will be presented with a notification box. Click OK to close the notification box and go to the main Scanner screen. Click Show Results and you will be presented with a list of all the infected files Malwarebytes’ Anti-Malware has detected.





Step 5. Click Remove Selected and Malwarebytes’ Anti-Malware will remove all the infected files it has detected. It may be necessary to restart your computer in order to remove some of these files. After Malwarebytes’ Anti-Malware is done removing all the infected files, it will open Notepad and present the scan log to you. You can review the log at your leisure – save it If you want.



Step 6. Close Malwarebytes’ Anti-Malware and you’re done. No traces of Windows System Defender should be left on your computer.

Manual removal guide

Using Task Manager, shut down and remove the processes:



Access the Windows Registry Editor and delete the following registry keys:



Locate and delete the following files:



Disable the following DLL libraries:



Block access to the domain:



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