From Wiki-Security, the free encyclopedia of computer security

SystemDefender Information
Type: Spyware
Analysis: Installs & gathers info from a PC without user permission.
Infection: By downloading freeware & shareware.
Symptoms: Changes PC settings, excessive popups & slow PC performance.
Detection Tool: >>> Download SpyHunter's Spyware Scanner <<<

SpyHunter's spyware scanner is intended to quickly scan and identify spyware on your PC. If you wish to eliminate spyware from your PC and prevent future spyware attacks, we recommend you buy SpyHunter's spyware removal tool, which includes full technical support and a Spyware HelpDesk to tackle spyware that is uniquely affecting your PC.
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SystemDefender is a fake anti-spyware application that appeared on September 21, 2007. Usually SystemDefender is downloaded and installed by Trojans or through browser security exploits. Once executed, SystemDefender will offer you a free system scan for spyware. Then it will show you an exaggerated and fake scan report and will prompt you to purchase the full version of SystemDefender. Moreover, SystemDefender may open huge browser security holes and steal personal information, such as credit card numbers, banking accounts, PayPal passwords etc. SystemDefender may also download and execute hijackers, dialers and other malware.

To check your computer for SystemDefender, download SpyHunter Spyware Detection Tool.

SpyHunter spyware detection tool is only a scanner meant to assist you in detecting SystemDefender and other threats. If you detect the presence of SystemDefender on your PC, you have the opportunity to purchase the SpyHunter removal tool to remove any traces of SystemDefender.


Detection of SystemDefender (Recommended)

SystemDefender is difficult to detect and remove. SystemDefender is not likely to be removed through a convenient "uninstall" feature. SystemDefender, as well as other spyware, can re-install itself even after it appears to have been removed.

You also run the risk of damaging your computer since you're required to find and delete sensitive files in your system such as DLL files and registry keys. It is recommended you use a good spyware remover to remove SystemDefender and other spyware, adware, trojans and viruses on your computer.

Run a SystemDefender scan/check to successfully detect all SystemDefender files with the SpyHunter Spyware Detection Tool. If you wish to remove SystemDefender, you can either purchase the SpyHunter spyware removal tool to remove SystemDefender or follow the SystemDefender manual removal method provided in the "Remedies and Prevention" section.

Method of Infection

There are many ways your computer could get infected with SystemDefender. SystemDefender can come bundled with shareware or other downloadable software.

Another method of distributing SystemDefender involves tricking you by displaying deceptive pop-up ads that may appear as regular Windows notifications with links which look like buttons reading Yes and No. No matter which "button" that you click on, a download starts, installing SystemDefender on your system. SystemDefender installs on your computer through a trojan and may infect your system without your knowledge or consent.

If you think you may already be infected with SystemDefender, use this SpyHunter Spyware dectection tool to detect SystemDefender and other common Spyware infections. After detection of SystemDefender, the next advised step is to remove SystemDefender with the purchase of the SpyHunter Spyware removal tool.


SystemDefender may attempt to change your computer's desktop, hijack your browser, monitor your Internet browsing activities, change system files, and can do this without your knowledge or permission. Therefore, it is strongly recommended to remove all traces of SystemDefender from your computer.

Remedies and Prevention

SystemDefender, as well as other Spyware, are constantly evolving and becoming more advanced to avoid detection. SystemDefender along with its variants can install in different locations and even when you try to uninstall it you find they reappear when you reboot your computer.

Install a good anti-spyware software

When there's a large number of traces of Spyware, for example SystemDefender, that have infected a computer, the only remedy may be to automatically run a Spyware scan from a good anti-spyware software designed to detect SystemDefender and other types of spyware.

Remove SystemDefender manually

Another method to remove SystemDefender is to manually delete SystemDefender files in your system. Detect and remove the following SystemDefender files:


  • SystemDefender.exe
  • SpywareLocker.exe
  • SystemDefender_Installer[1].exe

Other Files

  • SystemDefender
  • SystemDefender Uninstall.lnk
  • SystemDefender.lnk
  • %ProgramFiles%\SystemDefender
  • %AppData%\SystemDefender

Registry Keys

  • HKEY_USERS\Software\SystemDefender
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\SystemDefender
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\"SystemDefender" = ""C:\Program Files\SystemDefender\SystemDefender.exe" hide"
  • SystemDefender

External links

If you believe your computer is infected with spyware,
Wiki-Security highly recommends to download SpyHunter's spyware detection tool to check for spyware on your PC.

Disclaimer Information
This website, its content or any portion of this website is NOT affiliated with, connected to, or sponsored by SystemDefender or its creators in any way. This website does not advocate the actions or behavior of SystemDefender and its creators. Our objective is to provide Internet users with the know-how to detect and remove SystemDefender and other Internet threats.

The readers of this article should not mistake, confuse or associate this article to be an advertisement or a promotion of SystemDefender in any way. The content provided on this website is intended for educational or informational purposes and is provided "AS IS" with no warranties, and confers no rights.