Note: The method will work on a system which is not affected by viruses. Otherwise you may not be able to delete virus files.
Indication of Virus
1. When you plugin a drive, Some Autoplay feature polls you to select a option. If you see a folder like icon that reads open using the program provided on the device. Does not select that. Also does not select Open folder to view files using Windows Explorer. Since the virus can execute with these options. Cancel it.
Note: Windows 7 has disabled the Autorun Option for Flash Drives, since the autorun source is usually unknown.
2. You will also see a folder like icon instead of Flash Drive Icon in my computer
Removal of Virus
1. In Start Menu Click RUN and then type cmd. Type your Flash Drive Letter followed with colon. Here
type attrib -r -a -s -h *.* and press enter.
This will unhide all files.
2. Correct Way of Opening Flash Drives
Note: Do not open the Flash Drive by double clicking the icon in my Computer or By Right clicking and then Open,Explorer
Open the USB Drive by using Folders Icon.
Click on the Folders icon then select your Flash Drive
You can select Your Flash Drive by using the Address Bar in Windows Explorer.
Type your Drive letter in the Address Bar
3. After Opening the drive. Select Details View using this icon
You can now see what the virus does with your Flash Drive. The Virus does disguises itself as folder. You can see that system file icon as illustrated here is similar to folder icon. You actually click on the file.
Actually you click on those virus file thinking of them as folder and the virus executes. In the detailed view you can clearly see that the system file has a Type description of Application and the system folder has a Type description of Folder.
Delete all such files. Carefully do not delete the folders.
4. Delete the Autorun.inf file
5. You can also delete these files using 7-ZIP. Since it shows such virus files as having application file icon.
Open 7-ZIP and Type your Flash Drive Letter in the Address Bar. Here J:\
6. Delete all the folders and files you think that you did not saved them.
The folders could have names like Recycler,System Volume. Delete them also.
You can also see the Recycle Bin like icons delete them too.
In this illustration these files are virus files
7. Now Scan your Flash Drive with some Anti-Virus to delete exe infecting viruses. This is because some application files (which can be some programs like Adobe Reader Setup or else) be affected with exe virus.
If you do not have a proper Anti-Virus then Click on Search and select All files and Folders
In the All or part of file name field type *.exe
In the Look In field select Your Flash Drive
In the More Advanced options select Search System Folders and Search Hidden files and Folders.