Antivirus System is a fake anti-spyware program that displays false scan results, fake security alerts, and does not allow you to run any application on your computer in order to scare you into purchasing it. This scareware is promoted through Trojans that pretend to be programs necessary to view online videos. You can also become infected by this software when visiting web sites that have been hacked with exploit kits. These exploit kits attempt to take advantage of vulnerabilities found on your computer that allow the program to be installed without your permission or knowledge.
Antivirus System screen shot
For more screen shots of this infection click on the image above.
There are a total of 5 images you can view.
Antivirus System will be configured to start every time you try to launch another application on your computer. Once started it will scan your computer and state that numerous files on your computer are infections. It will then prompt you to remove them, but will not allow you to do so until you first purchase the program. As the scan results are all fake and the files it detects are legitimate, please ignore anything this program displays.
Antivirus System will also block applications from running on your computer while stating that they are infected. It does this by hijacking the .EXE extension in your Windows Registry. This allows Antivirus System to launch before any application you start and to block it from running. It performs this behavior to scare you into thinking your legitimate programs are infected and also to protect itself from being removed by legitimate security programs. When Antivirus System blocks a program from running it will display an alert that states that the program is infected. The text of this message is:
Antivirus System Firewall Alert
iexplore.exe is infected with Trojan-Downloader.JS.Agent.ftu. Private data can be stolen by third parties, including credit card details and passwords.
When you see these messages, please do not be concerned as your applications are not infected.
While the infection is started it will also show a variety of security warnings that are worded to think that your computer has a serious security issue. Some of these alerts are:
Unknown program is scanning your system registry right now! Identity theft detected!
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.
Upgrade to full version of Antivirus System software package now! Clean your system and ward off new attacks against your system integrity and sensitive data. FREE daily updates and online protection from web-based intrusions are already in the bundle.
Just like the scan results, these security alerts are fake
and should be ignored.
As you can see, this computer infection was created to trick you into thinking your computer has a security problem so that you will then purchase it. 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
Antivirus System and related malware please use the guide below.
View Antivirus System files.
View Antivirus System Registry Information.
Tools Needed for this fix:
Symptoms that may be in a HijackThis Log:
O4 - HKCU\..\Run: [avsdsvc] %CommonAppData%\pavsdata\<number>.1.exe /min
07/13/13 - Initial guide creation.
Automated Removal Instructions for Antivirus System using Malwarebytes Anti-Malware:
- Print out these instructions as we will need to close every window that
is open later in the fix.
- 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:
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.
- Now we must first end the processes that belong to
and clean up some Registry settings so they do not interfere with the cleaning
procedure. To do this, please download RKill to your desktop from the following
Download Link - (Download page will open in a new tab or browser window.)
When at the download page, scroll down and click on the click on the link labeled Rkill.com download link. When you are prompted where to save it, please save it on your desktop.
- Once it is downloaded, double-click on the
icon in order to automatically attempt to stop any processes associated
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
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
. 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. If you continue
having problems running RKill, you can download the other renamed versions
of RKill from the rkill
download page. All of the 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.
Do not reboot your computer after running RKill as the malware programs will
- 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)
- Once downloaded, close all programs and Windows on your computer, including
- Double-click on the icon on your desktop named mbam-setup.exe.
This will start the installation of MBAM onto your computer.
- 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.
- MBAM will now start and you will be at the main screen as shown below.
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.
- 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.
- 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.
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
- You can now exit the MBAM program.
- 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:
detect vulnerable and out-dated programs using Secunia Personal Software Inspector
Your computer should now be free of the Antivirus System 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
View Associated Antivirus System Files
%CommonStartMenu%\Programs\Antivirus System\Antivirus System Help and Support.lnk
%CommonStartMenu%\Programs\Antivirus System\Antivirus System.lnk
%CommonStartMenu%\Programs\Antivirus System\Remove Antivirus System.lnk
File Location Notes:
%AllUsersProfile% refers to the All Users Profile folder. By default, this is C:\Documents and Settings\All Users for Windows 2000/XP and C:\ProgramData\ for Windows Vista, Windows 7, and Windows 8.
%CommonAppData% refers to the Application Data folder for the All Users Profile. By default, this is C:\Documents and Settings\All Users\Application Data for Windows 2000/XP and C:\ProgramData\ in Windows Vista, Windows 7, and Windows 8.
%CommonStartMenu% refers to the Windows Start Menu for All Users. Any programs or files located in the All Users Start menu will appear in the Start Menu for all user accounts on the computer. For Windows XP, Vista, NT, 2000 and 2003 it refers to C:\Documents and Settings\All Users\Start Menu\, and for Windows Vista, Windows 7, and Windows 8 it is C:\ProgramData\Microsoft\Windows\Start Menu\.
%CommonAppData% refers to the Application Data folder in the All Users profile. For Windows XP, Vista, NT, 2000 and 2003 it refers to C:\Documents and Settings\All Users\Application Data\, and for Windows Vista, Windows 7, and Windows 8 it is C:\ProgramData.
View Associated Antivirus System Windows Registry Information
HKEY_CURRENT_USER\Software\Classes\.exe "(Default)" = "<random>"
HKEY_CURRENT_USER\Software\Classes\.exe "Content Type" = "application/x-m"
HKEY_CURRENT_USER\Software\Classes\.exe\DefaultIcon "(Default)" = "%1"
HKEY_CURRENT_USER\Software\Classes\.exe\shell\open\command "(Default)" = ""%CommonAppData%\pavsdata\<number>.1.exe" /ex "%1" %*"
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run "avsdsvc" = "%CommonAppData%\pavsdata\<number>.1.exe /min"
HKEY_CLASSES_ROOT\.exe "(Default)" = "<random>"
HKEY_CLASSES_ROOT\.exe "Content Type" = "application/x-m"
This is a self-help guide. Use at your own risk.
BleepingComputer.com 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.