Difference between Worm and Trojan Viruses and how to fix when affected

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What are the difference between worm and Trojan horse in computer virus.

A computer virus is a malicious code which deletes or multiplies system files. A worm is a form of virus which affects computers in a network. Do Trojan horse function the same way as worm?

Then what are difference between above two forms of viruses? Do viruses affect routers and switches? Someone to tell me? What are the solutions to a system affected by virus.

Best Answer by seangel
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Answered By 0 points N/A #101503

Difference between Worm and Trojan Viruses and how to fix when affected


WORMS has a capability of replicating itself to your system, while TROJAN HORSE will appear as a useful software but will actually do damages once run or installed in your computer.

Yes! Viruses can affect routers and other hardware once we do not stop them.

Solutions to a system affected by Virus:

1. If your computer got a virus, don't panic. The first thing you have to do is to get an Antivirus software. Run a scan with your Antivirus. Once a virus is detected you can either remove or quarantine it. If you remove it the virus will be gone and your computer will be safe. If you quarantine a virus, you have to change the names of the files that is affected and put it in the quarantine folder to stop it from spreading. Remember that your Antivirus software has to be updated, just to ensure that your software has the latest fixes for a new viruses.

2. Steps to remove Malware.

  • Start your computer in Safe Mode. Press the "F8" repeatedly as you restart the computer.
  • Run the "Malware Removal Tool". Click Start, go to Run then type MRT then press Enter. If you encounter problems, try to download the most recent version of the tool from Microsoft Security to run the scan.
  • Click "Next".
  • Click "Full Scan" selection. The "Full Scan" has the greatest chance of detecting a virus. Click "Next" to begin the Full Scan.
  • Follow the instructions to stop and remove any viruses.
  • Click "Finish" when the repair is complete.
  • Restart your computer.

3. Deleting Trojans.

  • Download Antivirus that can help you to locate and delete Trojan virus, it can be AVG Antivirus.
  • Click "Download Now" in the program. A window will appear, you have options to "Save As" or "Cancel." Choose then click "Save As".
  • Open installation file on your pc by right clicking the file. Select "Open". The file should be at your desktop or at the default download folder.
  • Select and click on the License Agreement. Choose the directory where you want to place the software then click "Exit" or "Finish" after installation.
  • Open the program, double-click the icon on your desktop.
  • Update your Antivirus program. When it's done updating, you may continue. This will ensure that your scanner can locate all the Trojan viruses on your computer.
  • Perform a scan with your Antivirus software. Wait while the program looks for the Trojan viruses. Click "Remove" once they are found. This should delete the threats from your computer.

4. Shutting down Trojans.

  • Click "Start", open Control Panel. A new window will open.
  • Under the System menu, click "File System".
  • Click "Disable System Restore", then hit Ok. Trojan viruses may find into the System Restore folder, in which Antivirus programs are not allowed to modify. By disabling, it allows the viruses to appear as a threat.
  • Restart your unit. Press "F9" when the logo appears at the start-up screen.
  • Use "Tab" key to select "Safe Mode" then hit "Enter."
  • Open your Antivirus software.
  • Run a full scan, then allow it to remove any threats detected. List down the name of the threats that was unable to remove.
  • Open the system registry editor software. It will allow you to modify your system's registry files. Some recommended registry editors include HijackThis, RegEditX and Registry Workshop.
  • Scan your PC. The log of your computer's registry files will open.
  • Select the threats that you listed down in the log then remove them.
  • Restart your PC in its normal mode.

5. Always keep your Operating System updated. Keeping it up to date helps your PC to protect against malicious programs or files.

  • Click Start, select All Programs, then click Windows Update.
  • Click on "Check for Updates", then click on "Install Updates". Updated Windows will ensure that your security protection is up to date. Windows security protection helps to prevent Trojan viruses and may also help to fix the problems related with Trojan viruses.

6. Set up a Firewall (Click Start, go to Control Panel, Windows Firewall then make sure it's turned On). A firewall is a system which prevents unauthorized access to your computer. Firewalls has the ability to protect your computer against attack from the outside. A firewall is not going to rid you from your computer virus problems, but it will add extra security and protection to your computer or network.

7. Removing Trojans manually. Deleting registry values.

  • Click "Start", click "Run" then type "regedit" and then click on "Registry Editor".
  • Delete the following registry values from the left pane of Registry Editor. Deleting the wrong registry value can cause significant system errors.

HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionExplorerBrowser Helper Objects{02F96FB7-8AF6-439B-B7BA-2F952F9E4800}
HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionExplorerBrowser Helper Objects{2316230A-C89C-4BCC-95C2-66659AC7A775}
HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionExplorerBrowser Helper Objects{8109AF33-6949-4833-8881-43DCC232B7B2}
HKEY_CURRENT_USERSoftwareMicrosoftInternet ExplorerMainActive State

Close Registry Editor.

8. Unregister DLLs and Delete Files:

  • Click "Start", click "Run", type cmd.
  • Type the this commands into the Command Prompt. Hit "Enter" after each command and click "Yes", if asked to confirm the commands.

regsvr32 /u vzbb.dll
regsvr32 /u vturr.dll
del vzbb.dll
del vturr.dll
del dszigqd.dll

Close Command Prompt then restart your computer.

Answered By 0 points N/A #101504

Difference between Worm and Trojan Viruses and how to fix when affected


A virus is a program who attack itself with a computer program and it causes damage to the values of the other programs, hardware and to system registry. It only effects when some action is taken by some one.

Worm is another type of virus, it can copy itself without doing any action from someone. As it makes copies and then affects the whole process in a computer. It can travel across the network and thus cause a network problem also.

A Trojan horse look's like a program which is executable and it can be a file related to your work but when you execute, it starts getting problems in your system.

Antivirus protects from all of them but it should be updated for more effectiveness. Also firewalls protects from such problems.

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