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20 types of computer virus - Microsoft Windows Server Standard 2003 for PC

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• As soon as you suspect that your computer has a virus, remove your computer from any networks it might be on, as well as from the Internet, so that you don't inadvertently spread the bug to others.
• If you have virus-scanning (anti-virus) software installed, run it.
• If you don't have anti-virus software, you'll need to obtain some. If you can't get it from a network administrator or download it from an uninfected computer, you can mail-order it from a retailer.
• Start your computer (still not connected to a network) and follow the instructions that came with the anti-virus software.
• Keep running the virus-scanning software until your computer comes up clean.
• Reconnect your computer to the Internet and check with the anti-virus software's publisher to make sure you have the latest updates. If not, download them now.
• After updating the anti-virus software, run it again until your computer comes up clean.

Posted on Dec 21, 2010

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Fash drive virus


Insert your USB drive in the appropriate USB slot in your computer.
If the Autoplay dialog box appears, select "Take No Action" and click the "OK" button.
Launch your anti-virus program, such as AVG Antivirus or Anti Malware.
Select the USB drive for the program to scan.
Click the "Start Scan" button or option.
Open the scan history for the USB drive when the scan is complete to see a list of viruses and warnings identified by the antivirus software.
If desired, select the options to "Heal All Infected Files" or "Move the Infected Files to the Virus Vault" to ensure these files are quarantined from your system.
Highlight each infected file in the scan history.
Write down the file name of each infected file identified on the USB drive.
Minimize the application's window.
Select "Run" from the Windows "Start" menu. In the Run window, type "e:/" at the command prompt to switch to your USB drive (or type the drive letter for your USB drive).
Press the Enter key.
Type "attrib -s -h -r -a *.*" at the command prompt to remove the system, hidden, read-only and archive file attributes.
Press the Enter key.
Type "del ####.+++" where "####" is the file name of the infected file and "+++" is the file extension, at the command prompt line.
Press the Enter key.
For example, "del terriblevirus.exe" will specifically delete the Terrible Virus executable file. Repeat for each infected file on your list identified.
Close the command prompt window; that is, exit the Run utility.
Maximize the window for your anti-virus program (which is still open) and repeat Steps until no virus is detected on your USB drive.
Exit the anti-virus application.

or Click start click on my computer you should see your usb drive right click then select format.
another way is to control panel administrative tools computer management disk management Right Click on your drive select format

Sep 25, 2012 | Kingston 1 GB microSD Card with USB 20...

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Different types of Virus and their effect's.


Different Types of Computer Viruses There are Different Types of Computer Viruses could be classified in (origin, techniques, types of files they infect, where they hide, the kind of damage they cause, the type of operating system or platform they attack) etc. Let us have a look at them…

Computer Virus is a kind of malicious software written intentionally to enter a computer without the user’s permission or knowledge, with an ability to replicate itself, thus continuing to spread. Some viruses do little but replicate others can cause severe harm or adversely effect program and performance of the system. A virus should never be assumed harmless and left on a system. Most common types of viruses are mentioned below:

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Resident Viruses
This type of virus is a permanent which dwells in the RAM memory. From there it can overcome and interrupt all of the operations executed by the system: corrupting files and programs that are opened, closed, copied, renamed etc.

Examples include: Randex, CMJ, Meve, and MrKlunky.

Direct Action Viruses
The main purpose of this virus is to replicate and take action when it is executed. When a specific condition is met, the virus will go into action and infect files in the directory or folder that it is in and in directories that are specified in the AUTOEXEC.BAT file PATH. This batch file is always located in the root directory of the hard disk and carries out certain operations when the computer is booted.

Overwrite Viruses
Virus of this kind is characterized by the fact that it deletes the information contained in the files that it infects, rendering them partially or totally useless once they have been infected.

The only way to clean a file infected by an overwrite virus is to delete the file completely, thus losing the original content.

Examples of this virus include: Way, Trj.Reboot, Trivial.88.D.

Boot Virus
This type of virus affects the boot sector of a floppy or hard disk. This is a crucial part of a disk, in which information on the disk itself is stored together with a program that makes it possible to boot (start) the computer from the disk.

The best way of avoiding boot viruses is to ensure that floppy disks are write-protected and never start your computer with an unknown floppy disk in the disk drive.

Examples of boot viruses include: Polyboot.B, AntiEXE.

Macro Virus
Macro viruses infect files that are created using certain applications or programs that contain macros. These mini-programs make it possible to automate series of operations so that they are performed as a single action, thereby saving the user from having to carry them out one by one.

Examples of macro viruses: Relax, Melissa.A, Bablas, O97M/Y2K.

Directory Virus
Directory viruses change the paths that indicate the location of a file. By executing a program (file with the extension .EXE or .COM) which has been infected by a virus, you are unknowingly running the virus program, while the original file and program have been previously moved by the virus.

Once infected it becomes impossible to locate the original files.

Polymorphic Virus
Polymorphic viruses encrypt or encode themselves in a different way (using different algorithms and encryption keys) every time they infect a system.

This makes it impossible for anti-viruses to find them using string or signature searches (because they are different in each encryption) and also enables them to create a large number of copies of themselves.

Examples include: Elkern, Marburg, Satan Bug, and Tuareg.

File Infectors
This type of virus infects programs or executable files (files with an .EXE or .COM extension). When one of these programs is run, directly or indirectly, the virus is activated, producing the damaging effects it is programmed to carry out. The majority of existing viruses belong to this category, and can be classified depending on the actions that they carry out.

Companion Viruses
Companion viruses can be considered file infector viruses like resident or direct action types. They are known as companion viruses because once they get into the system they "accompany" the other files that already exist. In other words, in order to carry out their infection routines, companion viruses can wait in memory until a program is run (resident viruses) or act immediately by making copies of themselves (direct action viruses).

Some examples include: Stator, Asimov.1539, and Terrax.1069

FAT Virus
The file allocation table or FAT is the part of a disk used to connect information and is a vital part of the normal functioning of the computer.
This type of virus attack can be especially dangerous, by preventing access to certain sections of the disk where important files are stored. Damage caused can result in information losses from individual files or even entire directories.

Worms
A worm is a program very similar to a virus; it has the ability to self-replicate, and can lead to negative effects on your system and most importantly they are detected and eliminated by antiviruses.

Examples of worms include: PSWBugbear.B, Lovgate.F, Trile.C, Sobig.D, Mapson.

Trojans or Trojan Horses
Another unsavory breed of malicious code are Trojans or Trojan horses, which unlike viruses do not reproduce by infecting other files, nor do they self-replicate like worms.

Logic Bombs
They are not considered viruses because they do not replicate. They are not even programs in their own right but rather camouflaged segments of other programs.

Their objective is to destroy data on the computer once certain conditions have been met. Logic bombs go undetected until launched, and the results can be destructive.


on Jul 09, 2010 | Computers & Internet

1 Answer

Virus


A program or piece of code that is loaded onto your computer without your knowledge and runs against your wishes. Viruses can also replicate themselves. All computer viruses are manmade. A simple virus that can make a copy of it over and over again is relatively easy to produce. Even such a simple virus is dangerous because it will quickly use all available memory and bring the system to a halt. An even more dangerous type of virus is one capable of transmitting itself across networks and bypassing security systems.
Since 1987, when a virus infected ARPANET, a large network used by the Defense Department and many universities, many antivirus programs have become available. These programs periodically check your computer system for the best-known types of viruses.
Some people distinguish between general viruses and worms. A worm is a special type of virus that can replicate it and use memory, but cannot attach it to other programs.

Or


A computer virus is a computer program that can copy itself[1] and infect a computer. The term "virus" is also commonly but erroneously used to refer to other types of malware, including but not limited to adware and spyware programs that do not have the reproductive ability. A true virus can spread from one computer to another (in some form of executable code) when its host is taken to the target computer; for instance because a user sent it over a network or the Internet, or carried it on a removable medium such as a floppy disk, CD, DVD, or USB drive.

May 08, 2011 | Computers & Internet

1 Answer

Virus


A program or piece of code that is loaded onto your computer without your knowledge and runs against your wishes. Viruses can also replicate themselves. All computer viruses are manmade. A simple virus that can make a copy of it over and over again is relatively easy to produce. Even such a simple virus is dangerous because it will quickly use all available memory and bring the system to a halt. An even more dangerous type of virus is one capable of transmitting itself across networks and bypassing security systems.
Since 1987, when a virus infected ARPANET, a large network used by the Defense Department and many universities, many antivirus programs have become available. These programs periodically check your computer system for the best-known types of viruses.
Some people distinguish between general viruses and worms. A worm is a special type of virus that can replicate it and use memory, but cannot attach it to other programs.

Or


A computer virus is a computer program that can copy itself[1] and infect a computer. The term "virus" is also commonly but erroneously used to refer to other types of malware, including but not limited to adware and spyware programs that do not have the reproductive ability. A true virus can spread from one computer to another (in some form of executable code) when its host is taken to the target computer; for instance because a user sent it over a network or the Internet, or carried it on a removable medium such as a floppy disk, CD, DVD, or USB drive.

May 06, 2011 | Computers & Internet

1 Answer

Types of computer virus


> types of computer virus

This sounds like a "homework" question.

Access http://www.google.com and enter 'types of computer virus', to get the answer.

Dec 06, 2010 | Computers & Internet

1 Answer

My laptop will randomly freeze every 20-30 mins, i have no viruses i have wise registry booster and wise registry disk cleaner, it was working perfectly then the next morning i turn it on it starts...


It is also important to remove the suspicious applications and programs in the computer to avoid Windows freezing. In this type of infection not only your Windows registry gets corrupted and needs massive repair but also there is virus based penetration in the Windows set up. In this situation it is recommended to conduct a virus scan as well.However, if your Windows freezes up, the best solution is to repair the computer registry.use registry cleaner reginout

Oct 17, 2010 | Toshiba Satellite A135-S2276 Notebook

2 Answers

Can a virus infected pc be treated instead of reformatting it?


Yes it is possible but it may not fully remove the virus, it depends upon the type of virus infection.
If you have not installed a virus protection program, then this makes your task more difficult.
I would try a WEB base virus removal program first, provided you can connect to the Internet. Try these WEB base virus links first and if successful then install a virus program.
WEB-based Virus Scan Trend Micro housecall
http://housecall.trendmicro.com
symantec - Norton Security Scan
http://security.symantec.com
If all fails then you need to format your hard disk and install Windows again together with the computer's device drivers and your programs.

May 04, 2010 | ASUS Eee 2G Surf Notebook

1 Answer

I can not get letters, especially vowels, to always type out


try to reload the OS. it may be virus issue if no go try run 32bit diag from your driver cd. and tell me the error code.

sudipta2k21@gmail.com

Nov 16, 2009 | Dell Latitude D830 Laptop Computer PC...

4 Answers

Hard drive


it might be because of virus,that stop you to enter your hard disk when you click on it..install anti virus like avg 7.5,mcafee ,norton to check for the virus .

also goto start >open Run>cmd to open command prompt and type
chkdsk
to check your driver for errors.

Apr 24, 2008 | Computers & Internet

1 Answer

Some of the sites are banned in my computer


It is a  type of virus,So do format your c drive...or the total drives.Then you will be free from that virus.

Oct 01, 2007 | Vtech Cordless Phone Battery for 2429,...

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