Remove PC Defender (Uninstall Guide)

Posted by Lawrence Abrams on February 19, 2010 @ 05:55 PM · Views: 10,444

 

What this infection does:

PC Defender is a rogue anti-spyware program that is installed through Trojans. The Trojan installer pretends to be a program that is needs to be installed before you can view an online video. Once you install the Trojan it will download and install PC Defender on to your computer without your permission. When the rogue is installed it will be configured to start automatically when you login to Windows. Once running, PC Defender will scan your computer and list a variety of infections. It will not allow you to remove any of these infections, though, until you first purchase the program. In reality, the infections it shows are legitimate Windows files that if you delete could cause your computer to not operate properly. Therefore, please do not act upon any of the scan results this program may show you.

 

PC Defender screen shot
For more screen shots of this infection click on the image above.
There are a total of 4 images you can view.

 

Without a doubt, PC Defender Center was created to scam you out of your money by making you think your computer has a security problem. Do not purchase this program, and if you already have, please contact your credit card company and dispute the charges. Last, but not least, to remove this program and any related malware, please use the removal guide below.

 

Threat Classification:

• Information on Rogue Programs & Scareware

 

Advanced information:

View PC Defender files.
View PC Defender Registry Information.

 

Entries for this program found in the Add or Remove Programs control panel:

PC Defender

 

Tools Needed for this fix:

• Malwarebytes' Anti-Malware

 

Symptoms that may be in a HijackThis Log:

F2 - REG:system.ini: UserInit=C:\WINDOWS\system32\userinit.exe,"C:\Program Files\Def Group\PC Defender\Antispyware.exe"

 

Guide Updates:

02/19/10 - Initial guide creation.

 

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Automated Removal Instructions for PC Defender using Malwarebytes' Anti-Malware:

 

1. Print out these instructions as we will need to close every window that is open later in the fix.
   
   
2. Download Malwarebytes' Anti-Malware, or MBAM, from the following location and save it to your desktop:
   
   Malwarebytes' Anti-Malware Download Link (Download page will open in a new window)
   
   


3. Once downloaded, close all programs and Windows on your computer, including this one.
   
   
4. Double-click on the icon on your desktop named mbam-setup.exe. This will start the installation of MBAM onto your computer.
   
   
5. 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 both the Update Malwarebytes' Anti-Malware and Launch Malwarebytes' Anti-Malware checked. Then click on the Finish button.
   
   
6. MBAM will now automatically start and you will see a message stating that you should update the program before performing a scan. As MBAM will automatically update itself after the install, you can press the OK button to close that box and you will now be at the main program as shown below.
   
   
   
   
   
   
   
7. On the Scanner tab, make sure the the Perform full scan option is selected and then click on the Scan button to start scanning your computer for PC Defender related files.
   
   
8. MBAM will now start scanning your computer for malware. This process can take quite a while, so we suggest you go and do something else and periodically check on the status of the scan. When MBAM is scanning it will look like the image below.
   
   
   
   
   
   
   
9. When the scan is finished a message box will appear as shown in the image below.
   
   
   
   
   
   
   You should click on the OK button to close the message box and continue with the PC Defender removal process.
   
   
10. You will now be back at the main Scanner screen. At this point you should click on the Show Results button.
    
    
11. A screen displaying all the malware that the program found will be shown as seen in the image below. Please note that the infections found may be different than what is shown in the image.
    
    
    
    
    
    
    
    You should now click on the Remove Selected button to remove all the listed 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. When MBAM has finished removing the malware, it will open the scan log and display it in Notepad. Review the log as desired, and then close the Notepad window.
    
    
13. You can now exit the MBAM program.
    

Your computer should now be free of the PC 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.

If you are still having problems with your computer after completing these instructions, then please follow the steps outlined in the topic linked below:

Preparation Guide For Use Before Using Malware Removal Tools and Requesting Help

 

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Associated PC Defender Files:

c:\Documents and Settings\All Users\Desktop\PC Defender.lnk
c:\Documents and Settings\All Users\Start Menu\Programs\PC Defender
c:\Documents and Settings\All Users\Start Menu\Programs\PC Defender\PC Defender.lnk
c:\Program Files\Def Group
c:\Program Files\Def Group\PC Defender
c:\Program Files\Def Group\PC Defender\Antispyware.exe
c:\Program Files\Def Group\PC Defender\hook.dll
c:\Program Files\Def Group\PC Defender\proccheck.exe

 

Associated PC Defender Windows Registry Information:

HKEY_USERS\.DEFAULT\Software\Def Group\Antispyware
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon "Userinit" => "C:\WINDOWS\system32\userinit.exe,"C:\Program Files\Def Group\PC Defender\Antispyware.exe""