Friends many of your PC/laptop's normally gets virus because of Pen Drives or USB devices (Even PC's who are not connected to network ). Some Virus like Ravmon Virus , Heap41a worm which are not detected by anti virus normally spreads mostly by the Pen Drives . In such a case what can you do to prevent your PC from getting infected with Virus that spreads through USB devices or Pen Drives ? You can protect your PC by just following the simple steps below . It won't take much time. * Connect your Pen Drive or USB drive to your computer . * Now a dialogue window will popup asking you to choose among the options as shown in the figure . * Don't choose any of them , Just simply click Cancel as highlighted in the figure shown. * * *Now go to Start--> Run and type cmd to open the Command Prompt window .. * *Now go to My Computer and Check the Drive letter of your USB drive or Pen Drive. ( E.g. If it is written Kingston (I:) , then I: will be the drive letter .) * *In the Command Window ( cmd ) , type the drive letter: and Hit Enter .. * *Now type dir/w/o/a/p and Hit Enter * *You will get a list of files . In the list , search if anyone of the following do exist * 1. Autorun.inf * 2. New Folder.exe * 3. Bha.vbs * 4. Iexplore.vbs * 5. Info.exe * 6. New_Folder.exe * 7. Ravmon.exe * 8. RVHost.exe or any other files with .exe Extension . * * If you find any one of the files above , Run the command attrib -h -r -s -a . and Hit Enter. * Now Delete each File using the following Command del filename ( E.g del autorun.inf ) . * That's it . Now just scan your USB drive with the anti virus you have to ensure that you made your Pen Drive free of Virus .