Remove Win 7 Defender (Uninstall Guide)

  • December 19, 2012
  • 12:55 PM
  • Read 32,831 times

What is Win 7 Defender?

Win 7 Defender is a computer infection that is part of the Rogue.PCDefPlus family of scareware programs. This program is classified as a scareware program because it pretends to be a legitimate anti-virus program, but instead only shows fake scan results and false security warnings. This infection is spread by masquerading as a program required to view an online video. Once installed, it will change .exe associations so that when you launch an executable on your computer, Win 7 Defender will be started instead. Once the infection is started it will then pretend to scan your computer and state that there are numerous infections present. If you try any remove any of these so-called infections, it will state that you first need to purchase the program before removing anything.

  • Win 7 Defender screen shot
  • Scan Results
  • System Security Alert
  • Firewall Alert
  • Fake security warning

When an executable is launched on the infected computer, Win 7 Defender will issue an alert that states the program is infected will then terminate it. The text of this alert is:

Win 7 Defender Firewall Alert
Iexplore.exe is infected with Backdoor.Skynet.A1. Private data can be stolen by third parties, including credit card details and passwords.

Your normal programs are not actually infected and you can ignore this alert.

While installed, Win 7 Defender will also display fake security alerts that are worded to make you think that your computer is under attack or has viruses. These alerts are:

System Security Alert!
Vulnerabilities found
Background scan for security breaches has been finished. Serious problems have been detected. Safeguard your system against exploits, malware and viruses right now by activating Proactive Defence.

System Security Alert!
Unknown program is scanning your system registry right now! Identify the theft detected!

Just like the firewall alerts, these security warnings are all fake and can be ignored.

Without a doubt, Win 7 Defender was created for one reason; to scare you into thinking your computer was infected so that you will then purchase the program. With that said, please do not purchase this program , and if you already have, please contact your credit card company and dispute the charges stating that the program is a computer infection and a scam. To remove Win 7 Defender and related malware please use the guide below.

Win 7 Defender Removal Options

Self Help Guide

This guide is intended for advanced computer users only. Please ensure your data is backed up before proceeding. If you’re uncomfortable making changes to your computer, consider having a professional help clean your computer or ask in the forums.
  1. Print out these instructions as we may need to close every window that is open later in the fix.

  2. Reboot your computer into Safe Mode with Networking. To do this, turn your computer off and then back on and immediately when you see anything on the screen, start tapping the F8 key on your keyboard. Eventually you will be brought to a menu similar to the one below:

    MalwareBytes Anti-Malware Screen

    Using the arrow keys on your keyboard, select Safe Mode with Networking and press Enter on your keyboard. If you are having trouble entering safe mode, then please use the following tutorial: How to start Windows in Safe Mode

    Windows will now boot into safe mode with networking and prompt you to login as a user. Please login as the same user you were previously logged in with in the normal Windows mode. Then proceed with the rest of the steps.

  3. Before we can do anything we must first end the processes that belong to Win 7 Defender so that it does not interfere with the cleaning procedure. To do this we will download a program called Rkill on a clean computer and then transfer the program to the infected computer. You can transfer the files via a CD/DVD, external drive, or USB flash drive.

    The download link for Rkill is: - (Download page will open in a new tab or browser window.)

    When at the download page, click on the Download Now button labeled When you are prompted where to save it, please save it on your desktop.

    If you do not have any removable media or another clean computer that you can download Rkill onto, you can try and download it to your infected computer using another method. On the infected computer, right click on the Internet Explorer's icon, or any other browser's icon, and select Run As or Run as Administrator. If you are using Windows XP, you will be prompted to select a user and enter its password. It is suggested that you attempt to login as the Administrator user. For Windows 7 or Windows Vista, you will be prompted to enter your Administrator account password. This should allow your browser to open where you can then download Rkill from the above link and save it to a folder that your infected account can access.

  4. Once it is downloaded or transferred to the infected computer, double-click on the icon in order to automatically attempt to stop any processes associated with Win 7 Defender and other Rogue programs. Please be patient while the program looks for various malware programs and ends them. When it has finished, the black window will automatically close and you can continue with the next step. If you get a message that RKill is an infection, do not be concerned. This message is just a fake warning given by Win 7 Defender when it terminates programs that may potentially remove it. If you run into these infections warnings that close RKill, a trick is to leave the warning on the screen and then run RKill again. By not closing the warning, this typically will allow you to bypass the malware trying to protect itself so that RKill can terminate Win 7 Defender . So, please try running RKill until the malware is no longer running. You will then be able to proceed with the rest of the guide. Do not reboot your computer after running RKill as the malware programs will start again.

    If you continue having problems running RKill, you can download the other renamed versions of RKill from the RKill download page. All of these files are renamed copies of RKill, which you can try instead. Please note that the download page will open in a new browser window or tab.

  5. At this point you should download Malwarebytes Anti-Malware, or MBAM, to scan your computer for any any infections or adware that may be present. Please download Malwarebytes from the following location and save it to your desktop:

    Malwarebytes Anti-Malware Download Link (Download page will open in a new window)

  6. Once downloaded, close all programs and Windows on your computer, including this one.

  7. Double-click on the icon on your desktop named mbam-setup.exe. This will start the installation of MBAM onto your computer.

  8. When the installation begins, keep following the prompts in order to continue with the installation process. Do not make any changes to default settings and when the program has finished installing, make sure you leave Launch Malwarebytes Anti-Malware checked. Then click on the Finish button. If MalwareBytes prompts you to reboot, please do not do so.

  9. MBAM will now start and you will be at the main screen as shown below.

    Malwarebytes Anti-Malware

    Please click on the Scan Now button to start the scan. If there is an update available for Malwarebytes it will automatically download and install it before performing the scan.

  10. MBAM will now start scanning your computer for malware. This process can take quite a while, so we suggest you do something else and periodically check on the status of the scan to see when it is finished.

    Malwarebytes Anti-Malware

  11. When MBAM is finished scanning it will display a screen that displays any malware that it has detected. Please note that the infections found may be different than what is shown in the image below due to the guide being updated for newer versions of MBAM.

    MalwareBytes Scan Results

    You should now click on the Remove Selected button to remove all the seleted malware. MBAM will now delete all of the files and registry keys and add them to the programs quarantine. When removing the files, MBAM may require a reboot in order to remove some of them. If it displays a message stating that it needs to reboot, please allow it to do so. Once your computer has rebooted, and you are logged in, please continue with the rest of the steps.

  12. You can now exit the MBAM program. If Malwarebytes did not prompt you to reboot your computer, please do so that you are back in normal mode.

  13. As many rogues and other malware are installed through vulnerabilities found in out-dated and insecure programs, it is strongly suggested that you use Secunia PSI to scan for vulnerable programs on your computer. A tutorial on how to use Secunia PSI to scan for vulnerable programs can be found here:

    How to detect vulnerable and out-dated programs using Secunia Personal Software Inspector


Your computer should now be free of the Win 7 Defender program. If your current anti-virus solution let this infection through, you may want to consider purchasing the PRO version of Malwarebytes Anti-Malware to protect against these types of threats in the future.

View Associated Win 7 Defender Files

%AllUsersProfile%\Desktop\Win 7 Defender.lnk %CommonAppData%\pcdfdata\ %CommonAppData%\pcdfdata\<random>.exe %CommonAppData%\pcdfdata\app.ico %CommonAppData%\pcdfdata\config.bin %CommonAppData%\pcdfdata\defs.bin %CommonAppData%\pcdfdata\support.ico %CommonAppData%\pcdfdata\uninst.ico %CommonAppData%\pcdfdata\vl.bin %CommonStartMenu%\Programs\Win 7 Defender\ %CommonStartMenu%\Programs\Win 7 Defender\Remove Win 7 Defender.lnk %CommonStartMenu%\Programs\Win 7 Defender\Win 7 Defender Help and Support.lnk %CommonStartMenu%\Programs\Win 7 Defender\Win 7 Defender.lnk

View Associated Win 7 Defender Registry Information

HKEY_CLASSES_ROOT\.exe "(Default)" = "<random>" HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\pcdfdata HKEY_CURRENT_USER\Software\Classes\.exe\shell\open\command "(Default)" = ""%CommonAppData%\pcdfdata\<random>.exe" /ex "%1" %*" HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run "pcdfsvc" = "%CommonAppData%\pcdfdata\<random>.exe /min"

This is a self-help guide. Use at your own risk. can not be held responsible for problems that may occur by using this information. If you would like help with any of these fixes, you can ask for malware removal assistance in our Virus,Trojan,Spyware, and Malware Removal Logs forum.

If you have any questions about this self-help guide then please post those questions in our Am I infected? What do I do? and someone will help you.

search guides


Remember Me
Sign in anonymously
live chat software