Flash Disk Viruses have been “popular” for nearly two years, but as Microsoft vulnerability patch, various anti-virus software updates, it is still through a fast variant of the virus continues to wreak havoc the user’s computer and flash drive, and many people are infected with a USB virus without even realizing it, so let the growing conditions of infection. In this article, I still have to platitudes about, the USB virus infection principles and ways of preventing re-introduction time, and hopefully you the reader’s flash drive can increase the anti-virus knowledge with skills to address the annoying USB viruses.

“Flash Disk virus” refers to infect via the flash drive and spread the virus, as long as a computer, or a flash drive infected with a virus on this computer inserted in other flash drive, or insert a memory stick poisoning off the computer, all will be infected and spread very fast and difficult to prevent.

USB virus is through the Windows’s own “self-executing” function of the vulnerability to infection, usually the hard disk and flash disk’s root directory create a autorun.inf file through the file to infect, and modify the Windows registry file, so that the virus With the boot can be run automatically.

Why do anti-virus software can not stop the USB virus? In fact, many of the USB is because the virus itself is just a downloader (downloader), it will automatically go online to download variants of the virus (that is, will be “automatic online update” the virus ), and fast varieties, which need to rely virus signatures to detect the scanning software is, it is difficult to prevent, usually out of USB-virus can detect no more than 50%, and even if the antivirus software caught it, it is not necessarily the virus can kill off the USB.

2, what symptoms of poisoning?

Flash Disk in the computer virus is still able to work, but it may occur the following condition:

* significantly slowed the speed of your computer
*  Some disk drives can not open
*  Some programs can not run, or automatically shut down the abnormal
* Auto power off, etc.
*  antivirus software will continue to pop a warning window, but the option to remove the virus still continues to occur after the warning

Several of these are common symptoms of poisoning, but are not limited to USB viruses, other types of viruses may also have similar symptoms.

3, how to determine whether the poisoning?

To determine whether the virus in the way of the USB is very simple, just check your hard drive or flash drive if there are suspicious hidden files on it.

Steps are as follows:

1.Open “My Computer” and enter into ‘c’ drive.

2. To enter the “View” tab, according to the figure below, uncheck the “Show protected operating system files” and click on “Show all files and folders.”

3.Press  OK button, the normal should be some hidden files in the following diagram AUTOEXEC, NTDECT, boot … and so on (the file icon for the semi-transparent).

4.If you do not see these files, it means that your computer is successful, and it is a virus to show hidden files feature turned off. This time you can first enter the “command prompt mode”  type CMD and then press  enter.

5.File name in front of SHR indicates that the file has the system files, hidden, read-only, three attributes, such as the figure above with the mrsne.bat the autorun.inf file is there should not be Eighty per cent of the worm.

common virus extensions: exe cmd inf cmd bat com pif scr

Want to determine the virus is very simple, just enter:

If you see similar to the contents of the file on the map, which have open = xxxxxxx, said that the file is a virus.

6. Some viruses do not close the Show hidden files feature, this time as long as you take a look at C drive, there do not have any autorun.inf files, and more than one file size is about 90 ~ 200KB hidden files that you have poisoned.

Is not directly cut the file will be able to detoxify these viruses do? The answer is No, because the virus into the permanent memory is not possible to delete these files, instant unlocking software files through file deletion, will be produced out of a sudden, we must, through anti-virus software to remove.

Flash Disk is very easy to deal with the virus, and at present not yet 100% effective solution before, only to be vigilant, each time using the Flash Disk when they must be inspected once again to use, not only can make your computer more secure smooth, do not let your flash drive to become accomplices in the spread of the virus.