Antivirus .NET is a rogue anti-spyware program from the same family as Antivirus Scan . When this infection is installed on your computer it will be configured to start automatically. Once started it will scan your computer and list numerous infections in the scan results. If you attempt to remove any of these so-called infections it will state that you first need to purchase the program in order to remove anything. As these scan results are all fake, please do not purchase this program based upon anything it states.
To protect itself, Antivirus .NET will terminate most executables that you attempt to run. It does this to prevent you from running any security applications that may be able to remove the infection. When the rogue terminates the program it will display an alert stating that the program is infected. The text of this alert is:
Application cannot be executed. The file defrag.exe is infected. Do you want to activate your antivirus software now?
This alert should be ignored as the files you are attempting are not actually infected.
While running, Antivirus .NET will also display fake security alerts on your computer. These security alerts are used to make you think that there are various security problems on your computer. The text of some of these alerts include:
Windows Security Alert
Windows reports that computer is infected. Antivirus software helps to protect your computer against viruses and other security threats. Click here for the scan your computer. Your system might be at risk now.
Antivirus software alert
Your computer is being attacked by an Internet virus. It could be password-stealing attack, a trojan-dropper or similar.
Antivirus .NET will also configure your computer to use a proxy server so that it hijackthis your web browser to display warnings when you browse the web. This warning is:
Internet Explorer Warning - visiting this web site may harm your computer!
Most likely causes:
- The website contains exploits that can launch a malicious code on your computer
- Suspicious network activity detected
- There might be an active spyware running on your computer
Just like the fake scan results, these fake alerts and browser hijack messages are just another tactic to have you purchase the program.
As you can see, the warnings issued by this program are all fake, and once you realize that, the alerts become more of a nuisance rather than a concern. Therefore, do not purchase Antivirus .NET for any reason, and if you already have, please contact your credit card company and state that the program is a computer infection and a scam and that you would like to dispute the charge. To remove this infection and related malware, please follow the steps in the guide below.
Self Help Guide
If you are uncomfortable making changes to your computer or following these steps, do not worry! Instead you can get free one-on-one help by asking in the forums.
- Print out these instructions as we may need to close every window that is
open later in the fix.
- It is possible that the infection you are trying to remove will not allow
you to download files on the infected computer. If you run into this problem
when following the steps in this guide you will need to download the files
requested in this guide on another computer and then transfer them to the
infected computer. You can transfer the files via a CD/DVD, external drive,
or USB flash drive.
- Reboot your computer into Safe Mode with Networking using
the instructions for your version of Windows found in the following tutorial:
- This infection changes your Windows settings to use a proxy server that
will not allow you to browse any pages on the Internet with Internet Explorer
or update security software. Regardless of the web browser you use, for these
instructions we will first need need to fix this problem so that we can download
the utilities we need to remove this infection.
Please start Internet Explorer, and when the program is open, click on the Tools menu and then select Internet Options as shown in the image below.
- You should now be in the Internet Options screen as shown in the image below.
Now click on the Connections tab as designated by the blue arrow above.
- You will now be at the Connections tab as shown by the image below.
Now click on the Lan Settings button as designated by the blue arrow above.
- You will now be at the Local Area Network (LAN) settings screen as shown
by the image below.
Under the Proxy Server section, please uncheck the checkbox labeled Use a proxy server for your LAN. Then press the OK button to close this screen. Then press the OK button to close the Internet Options screen. Now that you have disabled the proxy server you will be able to browse the web again with Internet Explorer.
- Now we must end the processes that belong to
so that it does not interfere with the cleaning procedure. To do this, please
download RKill to your desktop from the following link.
RKill Download Link - (Download page will open in a new tab or browser window.)
When at the download page, click on the Download Now button labeled iExplore.exe download link. When you are prompted where to save it, please save it on your desktop.
If you are unable to connect to the site to download RKill, please go back and do steps 3-6 again and make sure the infection has not reenabled the proxy settings. You may have to do this quite a few times before you can get RKill downloaded. If you still cannot download the RKill program on the infected computer, you should download it to a clean computer and copy it to the infected one via a USB flash drive or CDROM.
- Once it is downloaded, double-click on the iExplore.exe
icon in order to automatically attempt to stop any processes associated with
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. Do not reboot
your computer after running RKill as the malware programs will start again.
If you continue having problems running RKill, you can download the other renamed versions of RKill from the RKill download page. Both of these 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.
- 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 mb3-setup-1878.1878-188.8.131.529.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 steps.
- 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:
How to detect vulnerable and out-dated programs using Secunia Personal Software Inspector
Your computer should now be free of the Antivirus .NET program. You may want to consider purchasing the PRO version of Malwarebytes Anti-Malware to protect against these types of threats in the future, as if you had the real-time protection component, that comes with the paid for version, activated it would not have allowed this infection to install.