Have computer virus problem?

Every computer user had problem when their computer were effected by virus such as trojan, malware or what ever type of virus.When you go to computer shop to solve problem, you not alert with you important file in hardisk.When technician want to repair pc computer like format.they not will backup your file.

Now you can remove virus from boot system using Avast Antivirus.It have boot time scan mode.

Once you have downloaded Avast anit-virus home edition either directly from Avast or from Downloads.com you will need to install the software. Avast installs through an installation wizard to help guide you through this process. It is recommended that you keep all default settings throughout the installation process.

After installation you will be prompted to restart your computer and allow Avast to run a boot-time scan of your computer. This scan will take a while to complete so you may wish to restart your computer later and postpone the scan for a time you will not need to use your computer. If Avast finds any viruses during the boot-time scan you will be prompted to either ignore, quarantine or delete the infected files. Quarantining the files is the best initial reaction to these prompts. This will isolate the infected files from the rest of your computer files to stop any spreading of the virus. Also, you can retrieve the file from the “virus chest” should its removal impact the operation of your computer.

Running Avast for the first time:

To run the Avast anti-virus program later, simply use the desktop icon or go through the Start menu. Avast will perform a system memory check before opening. This check can be skipped by clicking on the “Stop memory test” button. Avast will open along with the “Simple User Interface” window. This window provides first-time users with an explanation of the Avast graphical user interface along with tips and tutorial information on how to use the program. After you have familiarized yourself with this information, check off the box at the bottom next to the line “Don’t show this window next time” to prevent this window from opening each time you run Avast.

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How to remove autorun virus faster?

Many people not know about their computer are effected bay autorun virus,such as from pendrive, external hardisk and etc.

For Information autorun is a traditional feature in windows operating systems that enable media like the CD ROMs, USB Devices, Memory Sticks, DVDs, etc. to automatically launch the programs stored in them. This happens through an autorun.inf file present in the root directory of the USB Device or CD ROM and it contains a list of commands that get executed, as soon as the media is inserted into the appropriates drives of the PC. You will typically find autorun.inf on installation CD

Autorun is often confused with AutoPlay, a feature introduced in Windows XP. Though Microsoft intended it to be a useful feature, there are several viruses and malware that abuse the autorun.inf to spread itself.
How to delete Autorun Virus?

You can download antivirus software to remove the autorun virus.i always use that software.You can click download image.

or you can use manual step.

* First disable System Restore on all drives. To do this go to Control Panel - System and choose the System Restore tab. Check the option “Turn Off system Restore on all Drives”
* Clear all temporary internet files in your browser
* Do a Disk Cleanup of all the drives on your PC. To do this, navigate to Start ->All Program ->Accessories ->System Tool ->Disk cleanup, choose the drive that you want to clean up and click OK.Once the drive is cleaned, proceed to cleanup the remaining drives

Autorun Viruses spread themselves through removable media like USB frive, etc. They contain three executable files namely autorun.inf, kavo.exe and ntdelect.com. These are hidden files and they usually disable the Show hidden files and folders option, so that you can never see them.The only way to find these files is through the DOS command prompt.
Delete autorun.inf and ntdelect.com :

* Click Start, enter cmd and press Enter
* Check all the drives for the above three files.For eg: to check the files in C:, type dir c:\ /a/w in cmd prompt and press Enter. This will list all the system and exe files. Look out for autorun.inf and ntdelect.com files.Disable ‘hidden’,’system’ and ‘read only’ attributes for these files by typing

attrib -s -h -r c:\autorun.inf
attrib -s -h -r c:\ntdelect.com

* Then delete the files by typing

del c:\autorun.inf
del c:\ntdelect.com

Make sure that you delete ntdelect.com and not ntdetect.com which is a system file
* Repeat from step 2 for all other drives

Delete kavo.exe :

* Search for kavo.exe in C:\windows\system32\
* If you find it, type

attrib -s -h -r c:\windows\system32\kavo.exe

to disable ‘hidden’,’system’ and ‘read only’ attributes
* Delete kavo.exe by entering the command

del c:\windows\system32\kavo.exe

* Click Start, type regedit and press Enter. Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows \CurrentVersion\Run,and
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows \CurrentVersion\Run. Delete kavo and c:\windows\system32\kavo.exe value.

Enable ‘Show hidden files and folders’ option:

Open Notepad,copy and paste the following and save it as a showhidden.reg file.

Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\
CurrentVersion\Explorer\Advanced\Folder\Hidden\SHOWALL]
"RegPath"="Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\Advanced"
"Text"="@shell32.dll,-30500"
"Type"="radio"
"CheckedValue"=dword:00000001
"ValueName"="Hidden"
"DefaultValue"=dword:00000002
"HKeyRoot"=dword:80000001
"HelpID"="shell.hlp#51105"

Double click on the saved file to modify the registry.