Computer viruses are actually programs that copy themselves from one place to another automatically and destroy your data. Apart from infecting your files, there are many viruses that affect the efficiency of person working on PC. In simple words, I will say that these viruses irritate the person working on computer.
For example, some viruses create shortcuts of files present in USB drives. Other computer viruses hide all files and folders on USB drive. Not only they hide files and folders but also disable the option to unhide those files. Actually those viruses are executed by DOS commands that automatically set attributes of all files and folders present on USB drive to “System files and Folders”. And system files are always hidden. For system files, the option to unhide them through properties window will also be disabled.

 So, in order to show hidden files and folders you will be required change attributes of those files. Firstly, I will recommend you to install antivirus program on your computer. Since USB viruses are much common these days so you can install USB Disk security get rid of USB viruses.



How to show Hidden System Files and Folders?

In order to show hidden files and folders in Windows 7, open the folder containing you files and click on Organize tab>Folder and search options. Now click on View tab and uncheck the option named “Hide protected operating System Files”. Also click on “Show hidden files and folders” option. When you apply the new settings, all the files and folders will become visible.

If you want to UnHide those system files and folders, follow the steps below.

Click on the start button and type cmd in the search box.
Click on cmd and it will open a black DOS window.
Type the following command there and press enter.
attrib -H -S G:\*.* /S /D /L
Hit enter button and it will show hidden files and folders from G drive.
You can replace “G:\” in the above command with the path of your required folder or USB drive. Remember that *.* will apply the attribute to all the files and folders present there.
In the above command, -H and –S and the attributes. The first one will show the hidden files and folders whereas the second one will convert system files to normal files.

If you change negative signs to positive in above commands, it will make those files again hidden and system.


If you face any problem, then feel free to comment below.  

HI
I JUST WANT TO TELL U THIS PROBLEM IS CREATED BY TROJAN DOWNLOADER VIRUS THIS COULD NOT BE REMOVED FROM ANY ANTIVIRUS WHEN IT IS ACTIVE AND WRITE PROTECTED  , THIS VIRUS IS CLEANED BY MICROSOFT SECURITY ESSENTIAL SOMETIMES.

TO FORMAT YOUR PENDRIVE USB, MEMORY CARD OR AN I-POD .
YOU HAVE TO DOWNLOAD UTILITY SOFTWARE CLICK HERE TO DOWNLOAD.

ANOTHER LINK: CLICK HERE

Or

Is your computer prompting 'Write Protected' when your trying  to format your pen drive.
Here comes the cool trick to format easily-


1.Download this application here.
2.Install the application in your PC.
3.Open the application and select the drive to fix the problem
eg-If the  Removable disk F has the problem choose accordingly.
4.Then click format.


THIS IS LOW LEVEL FORMAT TOOL . I USED IT IS 100% WORKING .

THANK YOU