Here is the complete step by step method to clean your USB and form other drives.
Go to start -->Run and type cmd to open command prompt.
Step 2:
Go to my computer check the drive letters of your USB or Pen Drive.
(EX: It is H, I or any thing else)
In cmd (Command Prompt) type the drive letter that you want to clean. And hit enter.
Step 3:
Now type dir/w/o/a/p and hit Enter
You will get list of files. In the list, search if any one of the following do exist.
autorun.inf
New Folder.exe
bha.vbs
iexplorer.vbs
info.exe
New_Folder.exe
Ravmon.exe
Rvhost.exe
and other files with .exe Extension
Step 4:
If you find any one of the files above. Type in command prompt
attrib -h -r -s -a *.*
and hit Enter.(Contain spaces)
Step 5:
Now delete each file using the following command del filename and hit enter.
EX: del autorun.inf
Now just scan your USB drive with any anti virus to ensure that your USB drive is free of virus.