A guide on how to remove Anti-Virus Number 1

  • March 15, 2009
  • 05:29 PM
  • Read 24,666 times

What is Anti-Virus Number 1?

Skip this and learn how to remove Anti-Virus Number 1!

Anti-Virus Number 1 is a clone of the Anti-Virus-1 and Antivirus 2010 rogue anti-spyware programs. This program uses deliberate false advertising to make it appear that Anti-Virus Number 1 is a legitimate program. Like its predecessor, Anti-virus-1, this version displays fake reviews that appear to be from highly respected sites in order to convince you that the program is legitimate. It does this by adding entries to your Windows HOSTS file so that when it displays pop-ups of these fake reviews they appear to be coming from a legitimate site, rather than from a server under the malware developer's control. Some of the sites that this program shows impersonations of include PCMag.com, CNET.com, Download.com, and PC Advisor. This malware is typically installed through the use of Trojans that display fake alerts on your computer stating that you are infected. Once you click on these alerts, Anti-Virus Number 1 will be download and installed onto your computer without your permissions.

  • Anti-Virus Number 1 image
  • Scanning screen
  • Scan results
  • Fake alert #1
  • Fake Windows Security Center
  • Internet Explorer Hijacked to show a warning from Anti-Virus Number 1

Once installed, Anti-Virus Number 1 will be configured to run when Windows starts. Once running, it will scan your computer and display scan results that are scripted to be the same regardless of the computer it is run on. This means that whatever Anti-Virus Number 1 shows during its scans should be ignored as the program was designed to always show those results no matter how clean your computer is. It does this to scare you into thinking you are infected in the hopes that you may purchase the program. While the program is running you will also continue to see alerts being displayed on your desktop stating that your computer is being hacked or that you have active malware on it. The text of some of these alerts include:

Internal conflict alert.
Anti-Virus Number-1 detected internal software conflict. Some applicztion tries to get access to system kernel (such behavior is typical to Spyware/Malware). It may cause crash of your computer.

Privacy Violation alert!
Anti-Virus Number-1 detected a Privacy Violation. A program is secretly sending your private data to an untrusted internet host. click here to block this activity by removing the threat (Recommended).

All of these alerts, including the scan results, should be ignored as they are just being used as a scam to make you into thinking you are infected. Instead, please use the free removal guide below in order to remove this infection.

Self Help Guide

This guide is intended for advanced computer users only. Please ensure your data is backed up before proceeding. If you are uncomfortable making changes to your computer or following these stpes, do not worry! Instead you can get free one-on-one help by asking in the forums.

This removal guide may appear overwhelming due to the amount of the steps and numerous programs that will be used. It was only written this way to provide clear, detailed, and easy to understand instructions that anyone can use to remove this infection for free. Before using this guide, we suggest that you read it once and download all necessary tools to your desktop. After doing so, please print this page as you may need to close your browser window or reboot your computer.


To terminate any programs that may interfere with the removal process we must first download the Rkill program. Rkill will search your computer for active malware infections and attempt to terminate them so that they wont interfere with the removal process. To do this, please download RKill to your desktop from the following link.


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


Once it is downloaded, double-click on the iExplore.exe icon in order to automatically attempt to stop any processes associated with Anti-Virus Number 1 and other malware. 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 a log file will open. Please review the log file and then close so you can continue with the next step. If you have 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 start again.


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

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


Double-click on the icon on your desktop named mbam-setup-bc.1878- 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.

Malwarebytes Anti-Malware

We now need to enable rootkit scanning to detect the largest amount of malware that is possible with MalwareBytes. To do this, click on the Settings section at the top of the MalwareBytes application and you wil be brought to the general settings section.

Now click on the Detection and Protection settings category on the left sidebar. You will now be shown the settings MalwareBytes will use when scanning your computer.

Malwarebytes Anti-Malware Detection and Protection Settings Page

At this screen, please put a checkmark in the option labaled Scan for rootkits. If you do not see this option, please make sure you are using the latest version of MalwareBytes.


Now that you have enabled rootkit scanning, click on the Scan button to go to the scan screen.

Malwarebytes Anti-Malware Scan Screen

Make sure Threat ScanStart Scan button. 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.

Malwarebytes Anti-Malware


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.


You can now exit the MBAM program.


As many malware and unwanted programs 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 Anti-Virus Number 1 program. If your current security solution allowed this program on your computer, you may want to consider purchasing the full-featured 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 link ed below:

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

Malwarebytes Anti-Malware

Purchase the full-featured version of Malwarebytes Anti-Malware, which includes real-time protection, scheduled scanning, and website filtering, to protect yourself against these types of threats in the future!

View Associated Anti-Virus Number 1 Files

c:\Documents and Settings\All Users\Application Data\AV1 c:\Documents and Settings\All Users\Application Data\AV1\AV1.cab c:\Documents and Settings\All Users\Application Data\AV1\av1.exe c:\Documents and Settings\All Users\Application Data\AV1\AV1i.exe c:\Documents and Settings\All Users\Application Data\AV1\AV1Two.exe c:\Documents and Settings\All Users\Application Data\AV1\QWProtect.dll c:\Documents and Settings\All Users\Application Data\AV1\svchost.exe c:\Documents and Settings\All Users\Desktop\Anti-Virus Number-1.lnk c:\Documents and Settings\All Users\Start Menu\Programs\Anti-Virus Number-1\Anti-Virus Number-1.lnk c:\Documents and Settings\All Users\Start Menu\Programs\Anti-Virus Number-1\Uninstall.lnk c:\Documents and Settings\All Users\Start Menu\Programs\Anti-Virus Number-1 C:\Windows\BasCw1RaU1oLasEc1S.exe

View Associated Anti-Virus Number 1 Registry Information

HKEY_CURRENT_USER\Software\AV1 HKEY_CLASSES_ROOT\AppID\{0D1DBFEE-0C43-4223-8B3E-A56FB3C5C87D} HKEY_CLASSES_ROOT\AppID\QWProtect.DLL HKEY_CLASSES_ROOT\CLSID\{8D187DFF-423F-41d3-A331-A60DE5886675} HKEY_CLASSES_ROOT\Interface\{0D1DBFEE-0C43-4223-8B3E-A56FB3C5C87D} HKEY_CLASSES_ROOT\QWProtect.QWProtectBHO HKEY_CLASSES_ROOT\QWProtect.QWProtectBHO.1 HKEY_CLASSES_ROOT\TypeLib\{CD30B357-F8F7-4AD1-BF68-04A219D21A69} HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{8D187DFF-423F-41d3-A331-A60DE5886675} HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run "Drives swap"

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.


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