System Tool

Also Known As: System Tool Rogue
Damage level: High

What is System Tool?

This program appears to scan your computer for viruses, but is developed only to trick people into buying it. System Tool is a complete scam - scare-ware that displays various security warnings to scare computer users into buying a full version of this fake antivirus program.

Commonly, this fake scanner is distributed through infected websites, various Worms, and Trojans. System Tool prevents users from running their programs and continually displays fake security warnings. Do not purchase this program, it is a scam.

If you have already purchased this fake antivirus software, you should contact your credit card company and dispute the charges, explaining that you have been tricked into buying a fake program. After the infection, System Tool may also change your wallpaper.

System tool rogue program

The following security warnings may appear on your screen when your computer is infected with System Tool:

“System Tool Intercept Warning. Programs that may compromise your privacy and harm your system have been detected on your PC. Click here to remove them immediately with System Tool.”
“System Tool Warning. Your PC is infected with dangerous viruses. Activate antivirus protection to prevent data loss and avoid the theft of your credit card details. Click here to activate protection.”
“Security Monitor: WARNING! Attention: System Tool detected a potential hazard (TrojanSPM/LX) on your computer that may infect executable files. Your private information and PC safety is at risk. To remove unwanted spyware and keep your computer safe, you need to update your current security software. Click Yes to download the official intrusion detection system (IDS software)”
“Warning! Application cannot be executed. The file cmd.exe is infected. Please activate your antivirus software.”

These security warnings are fake and you should remove System Tool from your system immediately by following the removal guide. System Tool is a malicious program that hijacks your computer and blocks execution of legitimate Windows programs.

By preventing you from running installed programs and disabling your Task Manager, this bogus security program protects itself from removal. When installed on your computer, System Tool will supposedly ‘detect’ various spyware and malware on your computer and attempt to convince you that it is the only program able to remove these threats.

You should not trust this program - it was designed by Cyber criminals with the intention of tricking you into purchasing a useless license key for a fake computer program. The list of high-risk security threats ‘detected’ on your PC is false.

When installed on your computer, System Tool creates random harmless files and then mimics their detection - identifying them as spyware and malware. Use the provided removal information to eliminate this fake security scanner.

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Quick menu:

System Tool removal:

Prior to installation, try entering this license key: WNDS-S0DF5-GS5E0-FG14S-2DF8G Entering the license key will not remove this rogue program, however, it will enable you to install the spyware remover program.

NOTE: Some spyware can block the downloading of spyware removers. If You cannot download the above remover using the default location, try one of the alternative download locations below:

  • Location 1 (The file is renamed to "iexplore.exe" since most spyware does not block this file)
  • Location 2

System Tool manual removal:

In the System Tool main window, search for the option to enter the license key and try to enter one of the following:


If this method works, System Tool should stop displaying security warnings and enable you to download legitimate antispyware software. Recommended download: Combo Cleaner or/and Malwarebytes antimalware.

Always update your security programs before running a full system scan.

Manual removal guide (if the license keys did not work):

1. Start your computer in Safe Mode. Click Start, click Shut Down, click Restart, click OK

During your computer starting process press the F8 key on your keyboard multiple times until you see the Windows Advanced Option menu, then select Safe Mode with Networking from the list.


2. Download HijackThis and save it to your desktop. Some malicious programs are able to block HijackThis, so when you click the download link, in the Save dialog, rename HijackThis.exe to iexplore.exe and only then click the Save button. After saving the file to your desktop, double click it.

In the main HijackThis window click the “Do a system scan only” button. Select the following entry (place a tick at the left of the entry):

O4 – HKCU\..\RunOnce: [{RANDOM}] C:\Documents and Settings\All Users\Application Data\{RANDOM}\{RANDOM}.exe

After selecting the required entry, click "Fix Checked". After this procedure you can close HijackThis and proceed to the next removal step.

3. After this procedure, download and install System tool remover to completely remove the infection.

NOTE: Some spyware can block the downloading of spyware removers. If You cannot download the above remover using the default location, try one of the alternative download locations below:

  • Location 1 (The file is renamed to "iexplore.exe" since most of spyware does not block this file)
  • Location 2

Other tools, known to remove "System Tool" spyware:

If you are unable to remove System Tool, you can use these manual removal instructions. Use them at your own risk, since if you do not have strong computer knowledge, you could harm your operating system.

Use them only if you are an experienced computer user. (Instructions on how to end processes, remove registry entries...)

End these System Tool processes:


Remove these System Tool registry entries:

KEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionRunOnce "[random]"

Delete these System Tool files:

C:Documents and SettingsAll UsersApplication Data[random]


The fake antivirus programs (also known as "rogue antivirus programs" or "scareware") are applications that tries to lure computer users into paying for their non-existent full versions to remove the supposedly detected security infections (although the computer is actually clean). These bogus programs are created by cyber criminals who design them to look as legitimate antivirus software. Most commonly rogue antivirus programs infiltrate user's computer using poop-up windows or alerts which appear when users surf the Internet. These deceptive messages trick users into downloading a rogue antivirus program on their computers. Other known tactics used to spread scareware include exploit kits, infected email messages, online ad networks, drive-by downloads, or even direct calls to user's offering free support.

A computer that is infected with a fake antivirus program might also have other malware installed on it as rogue antivirus programs often are bundled with Trojans and exploit kits. Noteworthy that additional malware that infiltrates user's operating system remains on victim's computer regardless of whether a payment for a non-existent full version of a fake antivirus program is made. Here are some examples of fake security warning messages that are used in fake antivirus distribution:

Fake pop-up used in rogue antivirus distribution example 1

Fake pop-up used in rogue antivirus distribution example 2

Computer users who are dealing with a rogue security software shouldn't buy it's full version. By paying for a license key of a fake antivirus program users would send their money and banking information to cyber criminals. Users who have already entered their credit card number (or other sensitive information) when asked by such bogus software should inform their credit card company that they have been tricked into buying a rogue security software. Screenshot of a web page used to lure computer users into paying for a non-existent full version of system tool rogue and other rogue antivirus programs:

example of a webpage used to collect payments for fake antivirus programs

To protect your computer from system tool rogue and other rogue antivirus programs users should:

  • Keep their operating system and all of the installed programs up-to-date.
  • Use legitimate antivirus and anti-spyware programs.
  • Use caution when clicking on links in social networking websites and email messages.
  • Don't trust online pop-up messages which state that your computer is infected and offers you to download security software.

Symptoms indicating that your operating system is infected with a fake antivirus program:

  • Intrusive security warning pop-up messages.
  • Alerts asking to upgrade to a paid version of a program to remove the supposedly detected malware.
  • Slow computer performance.
  • Disabled Windows updates.
  • Blocked Task Manager.
  • Blocked Internet browsers or inability to visit legitimate antivirus vendor websites.

If you have additional information on system tool rogue or it's removal please share your knowledge in the comments section below.

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About the author:

Tomas Meskauskas

Tomas Meskauskas - expert security researcher, professional malware analyst.

I am passionate about computer security and technology. I have an experience of over 10 years working in various companies related to computer technical issue solving and Internet security. I have been working as an author and editor for pcrisk.com since 2010. Follow me on Twitter and LinkedIn to stay informed about the latest online security threats. Contact Tomas Meskauskas.

PCrisk security portal is brought by a company RCS LT. Joined forces of security researchers help educate computer users about the latest online security threats. More information about the company RCS LT.

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Malware activity

Global malware activity level today:

Medium threat activity

Increased attack rate of infections detected within the last 24 hours.

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