Virus detection and removal

There may be several signs that a computer has a virus infection . It is often difficult to distinguish whether there is an hardware error or a software problem since viruses are  written to  avoid detection, and to damage your computer.

Some of  the common problems caused by computer viruses are:

1. Sudden system crashes and computer reboots automatically.
2. Application software crashes and random messages are displayed on the monitor.

3. Computer becomes very slow

4. Hard disk data gets corrupted and hard disk will not boot

How to fix it:

If there is a problem which could be caused either by a hardware malfunction or a virus , it is advisable to first run an antivirus program. It is cheaper and easier to solve a problem using free antivirus software.

Get a free antivirus program. Some of  the free antivirus programs available are:

1. Norton Anti Virus Special Edition 2005 from Symantec in Google Pack. Free updates for a period of six months

2. AVG Anti-virus free edition - change the default email scanning option as it slows the system down

3. Avast - can be installed for 60 days, before you register it for free

Download the anti virus software to your computer hard disk and install the software. Get the latest updates from the companies website.

Run the antivirus software, preferably in safe mode. If  any virus is detected, the antivirus software will first try to clean the infected file. If this is not possible, the software will quarantine the file.

To prevent computer virus problems in future

1. Install a firewall to protect your computer when you connect to the internet

2. Do not allow anyone to install software or copy any files to your computer without scanning the software /data with the latest updated anti virus software

3. Never open files with suspicious attachments, especially if they are from strangers. Always request files to be sent as a text attachment.

4. Avoid joining paid to read , adult , file sharing and other illegal websites,  the computers of visitors to these

websites usually get  infected with viruses and spy ware.

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Resource: http://fixit.in/antivirus.html

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How to remove Trojan Horse Virus manually ?

Manual Remove Trojan horse

Disable the System Restore feature on your computer. If this is still turned on, the system will restore any deleted files, including those infected by the Trojan horse. This can be done by going into the My Computer file and looking for the Performance option. Then select File System, Troubleshooting and Disable System Restore.

Turn on the computer and run it in safe mode. Restart the computer and when the words begin appearing on the screen, press the F8 key. This takes you to a new screen, where you'll select the safe mode option. Let the computer start as it regularly would before you continue.

Go into the Control Panel by clicking on the "Start" button at the bottom left-hand side of the screen and looking for the Control Panel. Select the Add or Remove Programs icon. The computer should then show a list of all programs existing on your system.

Look for programs that include Spyware or adware on your computer and select the Remove program option. Many users have found it helpful to look for programs that they didn't install and those that were installed when they downloaded a game or other program onto their computer.

Open the Windows System folder and delete all files that include the Trojan virus extension. Go through the list twice to make sure you removed all virus files. Then restart the computer in normal mode and check the folder again. If all the files are gone, you'll be ready to move on. If there are any remaining, remove them and restart the computer.

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source:-http://www.ehow.com

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