What is a Backdoor Virus?

A backdoor virus is a Trojan which enables access by remote hackers to a computer without the consent of the user. It creates a back
door that can be used by hackers to access and hack the information and
settings of your computer.
Once this malicious software enters your computer, it will gradually turn your computer over to the hackers.
Like other viruses, the backdoor virus also has the tendency to self replicate into a large
number. The most common and known files that are considered to carry this
malware are; aim95.exe, winupdate32.exe, and iexplore.exe.

Instructions to Remove Backdoor Virus

All Trojans and malware threats are unique in nature and require different removal tactics. For the removal of a back door virus
from the computer system you can adopt the following simple steps;

• If you do not have pre installed antivirus
  application, download FREE Kaspersky Antivirus and install onto your computer.
  If you have decided to purchase an antivirus application, first of all go
  through reviews about it. The reviews will help you in making the decision. If
  you do not want to purchase there are number of antivirus applications that are
  available free like Kaspersky.
• Install the latest available updates
  definitions, if in case you have just downloaded and installed antivirus it
  would include latest updates. However if you already have antivirus installed in
  the computer then before scanning you should update it by connecting to the
  internet.
• After updating the antivirus software,
  disconnect your computer from internet connection by unplugging the cable. This
  is essential because some times, backdoor viruses resist to be uninstalled if a
  system is connected to the internet. But if it is disconnected these Trojans
  will be helpless and antivirus applications can easily uninstall them from your
  computer.
• Reboot your computer into safe mood and turn
  off the option of ‘System Restore’, now run a full scan of your computer and
  wait for the results of scanning. The scanner will detect all the unwanted
  malwares and Trojans and show you a list of all malicious programs. After scanning
  antivirus will recommend you to either delete these files or quarantine them.
• Turn on the ‘System restore’ again and run it
  to create a restore point. To create a restore point navigate to ‘Start’ button
  and then click on ‘Accessories’ and go to ‘System Tools’ , click ‘System
  Restore’, check the option ‘Create  Restore
  Point’ name your restore point and click ‘Next’.

To remove the curse of Trojans like backdoor virus, you must go for reliable antivirus software. FREE Kaspersky Antivirus is a
reliable security program that eliminates the chances of unwanted malicious
attacks.

Cydoor is an adware program that is usually packaged
with freeware. When a computer is infected with this Trojan adware, advertisements
pop up randomly and disturb your PC use. Gradually the frequency of these popup
ads increase and can become extremely annoying.

This adware was created by Cydoor Technologies Ltd in
1997. But eventually many users found it annoying and obtrusive and looked for procedures
and methods to get rid of this threat.

Cydoor Removal Instructions

1. Since Windows 2000 was launched, each and every version of Windows
   operating system comes with a pre installed version of ‘Malware Removal Tool’.
   Run this tool to initiate the process of Cydoor removal. To initiate the
   ‘Malware Removal Tool’ click on ‘Start’ and then ‘Run’, type ‘MRT’ (without
   quotes) and click ‘Ok’. In case you are unable to run this tool, download its
   latest version from Microsoft where it is available for free.
2. When this tool opens, click on ‘Next’ button, a window will
   pop up from this window click on ‘Full Scan’ option. Full scan compared to quick
   scan offers greater chances of detecting and removing adware successfully.
3. After selecting the option of ‘Full Scan’ click on ‘Next’
   button to initiate the scanning process.
4. The scanner will detect and list the adware and ask you to take
   some required steps, follow the instructions that pop up during the process of
   scanning. When the process of scanning is completed, remove all the adware
   detected and listed by ‘Malware Removal Tool’ and click on ‘Finish’ button.
5. Restart your computer and enjoy your Cydoor free system and
   try to avoid downloading from unreliable sources to prevent the chances of
   attack.

It should be noted that before initializing the
scanning process with the ‘Malware Removal Tool’ it is recommended to reboot
your computer into safe mood and disconnect your computer from the internet.
Also remember to create a ‘Restore Point’ after a full scan is executed and
adware is removed permanently from your computer.

FREE Kaspersky Antivirus offers ease of use with its user friendly interface and
functionality. It has enhanced power to detect all the hidden adware that other
common antivirus fail to detect.

Beside power to detect the adware and malware, its automatic feature prevents any potential
attack from unwanted malicious software programs.

A virus can be embedded in your computer through a network file system, or by means of removable external media like,
CD, DVD, Floppy Drive, and USB Drives.

The development of different means of data transfer from one computer to another has increased the chances of viral attacks.
A USB drive is a major advancement in the field of data transfer but it can be a means of transferring viral or malware infected
files from one computer to another.
Once you insert a viral effected USB drive into your computer and open it, you will actually facilitate a viral attack to
your computer.

Steps to Remove a USB Virus

To secure your computer from a USB virus attack along with securing of data and information stored in the computer you
need to ensure that viruses are not transferred to your computer via USB drives.

• As a very first step, turn on
  your antivirus application, in case you do not have it then download and
  install this application and every time you connect your USB drive make sure to
  scan it.
• As precautionary step do not
  open the USB drive directly by using auto play or open feature. Turn off this
  feature. Scan you drive before opening it and remove all the malicious programs
  or files detected by antivirus application.
• For more reliable removal go
  for manual procedure. Go to ‘Start’ menu, open ‘Run’ command and type ‘cmd’
  (without quotes) and press enter to proceed.
• A command window will prompt,
  in this command window type the drive letter for USB drive like E:\, F:\ and
  etc.
• Now on this window type, dir
  name/w/a for example E:\w\a.

A list of files will appear, look for the following file names;
Autorun.inf, ravmon.exe, svchost.exe, new folder.exe, heap41a or other suspicious exe files.

• If above mentioned files are
  observed in the command window, it is obvious that the USB drive is infected
  and needed to be treated. Now you need to delete these ‘exe’ files to free your
  drive from viruses.
• To delete the viral exe files open
  command window by following above mentioned procedure and type attrib –r –a –s –h
  *.* and press enter. Now by doing this you have removed the read only and system
  and hidden files attribute associated with exe files.
• In the command window to delete
  the files type ‘del “filename”’ and press enter, for example type ‘del autorun.inf’.
  Delete all the suspicious files individually.
• Once again after removing the
  infected files permanently from your drive run a scan for your drive.
• Remove your USB safely and remember
  to turn off the auto play feature.

The FREE Kaspersky Antivirus comes with latest virus and malware definitions related
to USB drives.
It is reliable in detecting the Trojan files of drives as well. Kaspersky Antivirus releases you from the threats of
computer infections.

Confiker virus is the latest super virus that is also known as Downadup or Kido.

It spreads around the internet and affects the security of windows computers. This
worm restricts user’s access to system directories, security websites and
security applications like; Windows Automatic Update Service, Windows Defender
Service, and Windows Security Centre Service.

The conficker virus also removes all the created restore points from your computer hence
makes it hard for users to restore the computer to an earlier period.

The detection of this worm is difficult because during its attack it downloads many
other malware programs as well and allows hackers to access your computer.

Tips to Remove Conficker Virus:

This virus can attack your computer through internet, network or through external
removable devices like USB drives.

1. It is recommended to turn off the
auto run feature of USB drive;

• From your Desktop screen click
  on ‘Start’ and open the command of ‘Run’.
• On the address bar of ‘Run’
  window type ‘gpedit.msc’ (without quotes) and press enter.
• A Group Policy Window will pop
  up, from this window go to Computer Configuration and click ‘Administrative
  templates’ then click ‘System’.
• From the right hand pane double
  click the option stating ‘Turn off Auto Play’.
• From drop down menu choose ‘All
  Drive’ and select ‘Enable’.

2. For removing the worm, follow
the below described processes and steps;

• Click on ‘Start’ menu and then
  ‘Search’.
• From the ‘Search’ window check
  the option stating ‘All files and folders’.
• From the drop down list of
  destination folder select ‘Local Hard Drives’ and type the name of Conficker
  file and click ‘Search’ to detect that particular infected file.
• When the file is detected
  remove it permanently from your computer.

3. To stop the conficker process follow the following steps;

• Press ‘Ctrl + Alt + Delete’ to
  open Task Manger window.
• Click the tab titled
  ‘Processes’, a list of process will be shown, detect the infected process and
  right click the process and select ‘End process’ to stop the infected process.

4. To remove the Registry keys infected by this virus follow the below stated procedure;

• From your Windows desktop
  navigate to ‘Start’ menu and click on ‘Run’.
• On address bar type ‘regdit’
  and then click ‘Ok’.

This will open your
registry editor, in this window click ‘edit’ and then ‘Find’, in search box
type the name of infected registry key and delete it by right clicking it and
selecting ‘Modify’ and then ‘Delete’

Besides the above mentioned manual
procedure to delete the Conficker virus, FREE Kaspersky Antivirus offers you an
easy, reliable and automatic option to delete these worms.

You just need to download and install Kaspersky Antivirus and run a full scan of your computer. This security
application will detect all the Conficker viruses and remove them permanently.

A cookie is a piece of text stored in a computer by an internet web browser. A computer cookie is also termed browser cookie,
HTTP cookie or web cookie.

It should be remembered that cookies are not viruses or other malicious programs.
But it is necessary to clean these text files periodically to ensure optimum
performance of your computer. The files are stored in temporary system folders and
can easily be detected and removed.

They also cause PC slowdown so it’s important to remove them from time to time

Removing Cookies – Procedures and Steps:

It is important to note that different strategies and procedures are required to delete these files from different web browsers.
Depending on the type of web browser you can easily remove them from your computer
to enhance the performance of your PC. A general procedure for the removal of
cookies in most of the common web browsers;

General Method for ‘Windows Explorer’:

• Click on the window explorer
  ‘Start’ menu and then click on ‘Search’
• From ‘Search’ windows check the
  option of ‘All Files and Folder’ and type ‘Cookie’ into search box.
• From drive selection drop menu
  select ‘My Computer’ and click ‘Ok’ to start searching.
• The search operation will
  retrieve the required files and folders, open retrieved folders one by one.
• Right click the cookie that you
  want to delete and from option menu select ‘Delete’ to remove that particular cookie
  from your computer.

Removing Cookies using Antivirus:

• Antivirus application can
  assist you in removing cookies from your computer. If you already have
  installed antivirus then update it before scanning the system, and if you do
  not have antivirus security application then you need to first download and
  then install it.
• Before starting the scan, make
  sure that your security application is updated in accordance to latest
  available definitions and updates.
• Also ensure that the antivirus
  application that you are using is capable of detecting and removing cookies
  because there are some antiviruses that do not offer this feature.
• Run a full scan of your
  computer instead of a quick scan.
• Wait for the completion of
  scanning and when scanning completes delete or quarantine the detected cookies
  from your computer.

Note: Always remember to boot your computer into safe mood before running
a scan for your computer.

FREE Kaspersky Antivirus comes with advanced
feature of cookie detection. It helps its users to locate these temporary text
files easily and conveniently. FREE Kaspersky Antivirus can be downloaded and
installed for free and it comes with pre installed latest updates, making it
easier for users to remove and delete unwanted temporary text files.

Different software programs are available online that are meant to keep your computer safe from various kinds of viruses
and spyware.

However, some of them don’t meet their purpose and are used to install viruses on your computer.

Spywarebot is similar software that can be downloaded for free. People think that this software is a solution for spyware
and viruses that may invade their computers. However, this software itself become a source of viruses and thus is really annoying and dangerous for users.

Working of Spywarebot

While switching on the computer, this software runs a forced scan that detects a number of fake threats on the
computer and thus asks the user to delete the files. When a person clicks on that window, a window appears on the screen that asks the user to buy full
version of this software to help delete the files.

Some people buy the full version of spywarebot and get nothing in return.

One of the most problematic issues about this software is that it is very difficult to delete from the computer. Once it
is installed it shows no uninstallation feature and thus becomes a problem for thecomputer
user.

Methods to remove spywarebot

There are different ways that can be adopted to stop the working of spywarebot. Some of them are:

• Remove registry files and keys
• Remove it using control panel
  and other options
• Use good quality antivirus
  software like FREE Kaspersky Antivirus
• Keep the computer away from
  synchronizing devices

Above mentioned methods are good for treating such software. However, it is not easy to handle such spies that can
invade inside the hard disk of your computer and thus alter the settings of
your system.

Deleting spywarebot safely

It is better to uninstall or delete spywarebot from the computer. A search can be done for that in the local
drives.

Once the main icon of the software appears on the screen, the user can delete it. One thing must be kept in mind that you
should not put the software in the recycle bin but delete it properly so that it cannot keep monitoring the operations of the computer.
In case user is unable to delete this file from the computer then it is better to stop the processes of spywarebot. This
can be done by visiting windows task manager.

Using an Antivirus Program

A good antispyware tool like FREE kaspersky antivirus can be of great help in this regard. It will inform you about such files that try to
invade your system. Kaspersky antivirus is also good for other viruses that may harm your computer, but it is good especially against spywarebot.

What is Virtumonde adware?

Virtumonde adware is an adware program that could harm your computer by disabling many important
programs, blocking different kinds of websites and most importantly disable the
windows automatic updates.

Besides these infections, the Virtumonde adware also annoys PC users by continuously showing
the advertisements of antispyware programs, in the form of pop-up messages.

It becomes very difficult to completely remove these types of adware programs from your
computer. And the reason is that virtumonde adware automatically creates
different kinds of hidden files within your computer, which becomes very
difficult to remove.

Symptoms:

You can easily detect the presence of Virtumonde adware in your computer with the following:

• Your computer will start to slow down, because of very
  high consumption of the memory by this adware program.
• This program will automatically disable the features
  of the windows updates.
• The Virtumonde adware will try to terminate many of
  the computer’s running programs.
• Different kinds of pop-up messages will start to
  appear on your screen.
• It will automatically change the look of the computer’s
  background.

Software to Remove Virtumonde Adware

The manual way of removing the virtumonde adware program seems to be the cheap one, but it is a
very complex method which most people rarely adopt

An antivirus that can help everyone in complete removal of this adware program along with its
registry values is FREE Kaspersky Antivirus. The trial version of this
antivirus is available free of cost on the internet.
The Kaspersky Antivirus is very beneficial in the sense that it contains a complete set
of tools to remove all the infections from your computer.

Manually Removing Virtumonde Adware

Although the best and the easiest way of completely removing this malware from your computer is by
using Kaspersky antivirus, but you can still remove it without using the assistance
of any antivirus.

This manual method is a bit complex for which it is only recommended for the advanced users. This
method could be very much time consuming and still there is no confirmation of
complete removal of this adware from the computer after going through this
manual removal process.
The reason is that this adware copies its files within the computer system, just after its
installation. If you want to remove the adware from your computer system, just
follow the following steps:

• First move towards the Virtumonde DLL files and
  completely unregister them. These files are Ispak.dll, rulesak.dll,
  cidrules.dll

• Now go to the registry values of this adware program
  and remove them. Its registries are

HKEY_CLASSES_ROOT\atlevents.atlevents

What is Vundo Trojan Virus?

Vundo Trojan Virus is basically a new type of virus which not only annoys internet users by continuously showing different kinds of the pop-up messages, but also downloads the harmful infections onto the computer.

This Trojan installs different infections automatically into the PC without the knowledge of the internet user.  

All these infections have very adverse effects on the computer. The main problem that this virus can cause is the slowdown of the computer speed.

This virus usually runs in one of the start-up programs, so that no antivirus can detect it. And it is also distributed with the help of e-mails, which contains the link of different harmful and infected sites. Once the internet user click one of those links, a new window will appear, which automatically begins to download the virus onto the computer.

How to Avoid Vundo Trojan Virus

The Vundo Trojan Virus has reached the level of one of the greatest virus threats, because of the harm it can cause to any computer. That is why; one should initially try to adopt all possible means to stay away from such kinds of viruses.

Besides its harmful property, it also tries to annoy the internet users by regularly displaying different kinds of advertisements in the browser.

As known that the entry point of this type of virus to anyone’s computer is mostly by clicking on insecure links, which are mostly received in the form of e-mail messages.  

Therefore, one should try to stay away from these messages and send them to the spam folder.

Manually removing the Vundo Trojan Virus

Besides using some sort of antivirus program like FREE Kaspersky Antivirus, one can also adopt a few manual ways to completely remove these viruses from the computer.

These methods are usually recommended for only the advanced users, as these are complex and require some extra amount of time.

These methods are:

• First use registry editor and try to remove all those registry values, which are related to this Trojan virus.
• Secondly, search for different registry entries of the Vundo Trojan Virus and completely delete them.
• Third step is to unregister all the DLL files of this Vundo Trojan Virus, which can be done by using the command prompt, so that you can complete the removal process.



Kaspersky Antivirus

Besides using the complex and inefficient method of removing the virus, one can also use FREE Kaspersky antivirus.

Kaspersky antivirus is available free of cost on the internet, so that anyone can easily download it. This antivirus is very beneficial in the sense that it automatically detects and removes all the infections from the computer with the help of its multiple utilities.

An email virus refers to how the virus gains access into your computer, and not to the virus itself.  E-mail virus refers to those that you download, usually as an e-mail attachment.

Dangers of e-mail viruses

E-mail viruses can be very harmful.  Among the things they can do is;

• Slow down your computer
• Block access to security sites and disable your antivirus and antispyware
• Change your homepage to a different one, usually for financial gain on the part of the attacker
• Viruses can cause pop-ups to constantly appear on your screen, both when you’re online and offline
• Monitor your web browsing
• Install key logger software that will monitor your key strokes with the aim of capturing your passwords and transmitting them to the attacker

Precautions

There are measures you can take to try and prevent email viruses from infecting your computer.

• Never download any content from sites that you do not trust.  This includes most sites offering free fare i.e. music, movies, games or software
• Do not open attachments that you are not expecting or from people whom you do not know
• Scan all attachments before opening.  In order to do this, you will need to;
• Download and install a trusted antivirus, and keep it updated.  Kaspersky free antivirus is free and is highly recommended.
• Have a strong firewall on your computer and keep it current

How to remove email viruses

If despite taking all possible precautions, you do get infected with the email virus, don’t panic.  Take the following steps;

• Download an antivirus from a trusted site. FREE Kaspersky antivirus is a good example.
• Install the antivirus and run it.
• Do a complete scan of your computer.  When the scan is ongoing, ensure that no other program is running
• Delete the viruses when prompted
• The viruses on your computer may also have come with a payload of malware such as spyware.  For this you will need to download an antispyware program.  Spyware Cease and SpyZooka are highly recommended.
• Download the antispyware and run it.  This will get rid of any spyware on your computer.
• Remember to run regular scans of your whole computer so as to keep it safe and secure.

The W32 Kriz virus is a dangerous, almost lethal infection that will attack your computer BIOS.  It has a payload that is meant to run on Christmas day, hence the name, Kriz.

What the W32 Kriz Virus will do

The W32 Kriz Virus will;

• Infect your computer’s BIOS, eventually corrupting it completely to the point where you cannot boot up your computer
• Infect Portable Executable Windows files
• Infect the KERNEL32.DLL file by copying it, then corrupting it and replacing the original file with the corrupt version.  This will seriously hamper the working of your Windows files
• Overwrite and corrupt all files that you open or that are run by the computer
• Infect and overwrite files in all storage drives. 

How to tell if your computer is infected

You will know if your computer has been infected by the W32 Kriz virus if the following things happen;

• You network suddenly becomes very slow or takes longer than was normal before it responds
• You receive error messages related to the KERNEL32.DLL file.  Examples of these messages may be;
  •  an invalid page fault in module kernel32.dll
  • invalid page fault in module wsock32.dll

 How to remove the W32 Kriz virus

The W32 Kriz Virus was first discovered in 1999.  The good news is all antiviruses released since 2000 will detect and eliminate the W32 Kriz virus.  The only way your computer may be infected by this virus is if your antivirus is switched off or if you do not have any antivirus at all.

In case you have no antivirus, we strongly recommend that you download and run Kaspersky Free Antivirus.  Kaspersky antivirus is FREE, so there is no reason why you should’nt download it. 

Once you have downloaded the antivirus, you will need to install it on your computer then run it. 

You will also need to run a scan on the computer while it is in MS DOS mode.  This is so as to ensure that the virus is completely removed from the BIOS and other system files of your computer.