How to remove XP Anti-Virus 2011

XP Anti-Virus 2011 is a rogue antispyware program from the same family of malware as XP Antimalwate, XP Antimalwate 2010, etc. The program is installed via trojans without your permission and knowledge and uses misleading methods such false scan results and fake security warnings in order to trick you into purchasing its paid version. Thus, do not trust anything that this malware will display you and remove XP Anti-Virus 2011 from your system as soon as possible. Read below what you’ll want to know though is what does this malware do and how to remove it from your PC for free.

During installation, XP Anti-Virus 2011 registers its main file in the Windows registry so, it will run automatically every time when you start an application (files with “exe” extension). The rogue also uses this method of running to block the ability to run any programs, including legitimate antivirus and antispyware tools.

Once installed, XP Anti-Virus 2011 will imitate a system scan and report a large amount of infections. It hopes that you will then purchase its full version to cure the PC. Important to know, all of these infections found are fake, so you can safely ignore them!

While the rogue is running, it will display various nag screens and fake security warnings. Some of the alerts are:

Attention: DANGER!
ALERT! System scan for spyware, adware, trojans and viruses is complete.
XP Anti-Virus 2011 detected 29 critical system objects.

Security breach!
Beware! Spyware infection was found. Your system security is
at risk. Private information may get stolen, and your PC
activity may get monitored. Click for an anti-spyware scan.

System danger!
Your system is in danger. Privacy threats detected.
Spyware, keyloggers or Trojans may be working in the
background right now. Perform an in-depth scan and removal
now, click here.

Moreover, XP Anti-Virus 2011 will hijack your browser, so it will show a fake warning page instead a site that you want to visit. The fake warning state:

XP Anti-Virus 2011 ALERT
Internet Explorer alert. Visiting this site may pose a security threat to your system

Of course, all of these messages, warnings and alerts are a fake and supposed to scare you into thinking your computer in danger! Just like false scan results, ignore all of them!

As you can see, XP Anti-Virus 2011 is a scam which created with one purpose to scare you into thinking that your computer in danger as method to trick you into purchasing the full version of the program. If your computer is infected with this malware, then most importantly, do not purchase it! Uninstall the rogue from your PC as soon as possible. Use the removal guide below to remove XP Anti-Virus 2011 and any associated malware from your computer for free.

Use the following instructions to remove XP Anti-Virus 2011 (Uninstall instructions)

Step 1. Repair “running of .exe files”.

Method 1

Click Start, Run. Type command and press Enter. Type notepad and press Enter.
Notepad opens. Copy all the text below into Notepad.

Windows Registry Editor Version 5.00

[-HKEY_CURRENT_USER\Software\Classes\.exe]
[-HKEY_CURRENT_USER\Software\Classes\pezfile]
[-HKEY_CLASSES_ROOT\.exe\shell\open\command]

[HKEY_CLASSES_ROOT\exefile\shell\open\command]
@="\"%1\" %*"

[HKEY_CLASSES_ROOT\.exe]
@="exefile"
"Content Type"="application/x-msdownload"

Save this as fix.reg to your Desktop (remember to select Save as file type: All files in Notepad.)
Double Click fix.reg and click YES for confirm.
Reboot your computer.

Method 2

Click Start, Run. Type command and press Enter. Type notepad and press Enter.
Notepad opens. Copy all the text below into Notepad.

[Version]
Signature="$Chicago$"
Provider=www.myantispyware.com

[DefaultInstall]
DelReg=regsec
AddReg=regsec1

[regsec]
HKCU, Software\Classes\.exe
HKCU, Software\Classes\pezfile
HKCR, .exe\shell\open\command

[regsec1]
HKCR, exefile\shell\open\command,,,"""%1"" %*"
HKCR, .exe,,,"exefile"
HKCR, .exe,"Content Type",,"application/x-msdownload"

Save this as fix.inf to your Desktop (remember to select Save as file type: All files in Notepad.)
Right click to fix.inf and select Install. Reboot your computer.

Step 2. Remove XP Anti-Virus 2011 associated malware.

Download MalwareBytes Anti-malware (MBAM). Once downloaded, close all programs and windows on your computer.

Double-click on the icon on your desktop named mbam-setup.exe. This will start the installation of MalwareBytes Anti-malware 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 a checkmark is placed next to “Update Malwarebytes’ Anti-Malware” and Launch “Malwarebytes’ Anti-Malware”. Then click Finish.

MalwareBytes Anti-malware will now automatically start and you will see a message stating that you should update the program before performing a scan. If an update is found, it will download and install the latest version.

As MalwareBytes Anti-malware will automatically update itself after the install, you can press the OK button to close that box and you will now be at the main menu. You will see window similar to the one below.

Malwarebytes Anti-Malware Window

Make sure the “Perform quick scan” option is selected and then click on the Scan button to start scanning your computer for XP Anti-Virus 2011 infection. This procedure can take some time, so please be patient.

When the scan is finished a message box will appear that it has completed scanning successfully. Click OK. Now click “Show Results”. You will see a list of infected items similar as shown below.
Note: list of infected items may be different than what is shown in the image below.

Malwarebytes Anti-malware, list of infected items

Make sure all entries have a checkmark at their far left and click “Remove Selected” button to remove XP Anti-Virus 2011. MalwareBytes Anti-malware will now remove all of associated XP Anti-Virus 2011 files and registry keys and add them to the programs’ quarantine. When MalwareBytes Anti-malware has finished removing the infection, a log will open in Notepad and you may be prompted to Restart.

Note: if you need help with the instructions, then post your questions in our Spyware Removal forum.

XP Anti-Virus 2011 creates the following files and folders

%AppData%\yun.exe

XP Anti-Virus 2011 creates the following registry keys and values

HKEY_CURRENT_USER\Software\Classes\.exe
HKEY_CURRENT_USER\Software\Classes\.exe\DefaultIcon
HKEY_CURRENT_USER\Software\Classes\.exe\shell
HKEY_CURRENT_USER\Software\Classes\.exe\shell\open
HKEY_CURRENT_USER\Software\Classes\.exe\shell\open\command
HKEY_CURRENT_USER\Software\Classes\.exe\shell\runas
HKEY_CURRENT_USER\Software\Classes\.exe\shell\runas\command
HKEY_CURRENT_USER\Software\Classes\.exe\shell\start
HKEY_CURRENT_USER\Software\Classes\.exe\shell\start\command
HKEY_CURRENT_USER\Software\Classes\pezfile
HKEY_CURRENT_USER\Software\Classes\pezfile\DefaultIcon
HKEY_CURRENT_USER\Software\Classes\pezfile\shell
HKEY_CURRENT_USER\Software\Classes\pezfile\shell\open
HKEY_CURRENT_USER\Software\Classes\pezfile\shell\open\command
HKEY_CURRENT_USER\Software\Classes\pezfile\shell\runas
HKEY_CURRENT_USER\Software\Classes\pezfile\shell\runas\command
HKEY_CURRENT_USER\Software\Classes\pezfile\shell\start
HKEY_CURRENT_USER\Software\Classes\pezfile\shell\start\command
HKEY_CURRENT_USER\Software\Classes\.exe\shell\open\command | @ = “”%AppData%\yun.exe” /START “%1″ %*”
HKEY_CURRENT_USER\Software\Classes\.exe\shell\open\command | IsolatedCommand = “”%1″ %*”
HKEY_CURRENT_USER\Software\Classes\.exe | @ = “pezfile”
HKEY_CURRENT_USER\Software\Classes\.exe | Content Type = “application/x-msdownload”
HKEY_CURRENT_USER\Software\Classes\pezfile\shell\open\command | @ = “”%AppData%\yun.exe” /START “%1″ %*”
HKEY_CURRENT_USER\Software\Classes\pezfile\shell\open\command | IsolatedCommand = “”%1″ %*”