Save your system from getting infected with USB viruses using autorun.inf:

 When a virus is activated from a flashdrive, it creates an autorun.inf in your USB so that whenever you open the drive from another system, it can get activated and affect your system. This can be prevented using this simple method shown below:

• Open your USB using the command prompt by typing the drive name and ending it with a colon (For example, if the drive letter is F, type F: in the cmd).

• Now create a folder with the name AUTORUN.INF using your command prompt. For this, type mkdir AUTORUN.INF.

You are done. A virus cannot overwrite a folder. Thus, autoruns would not be created in your pen drive ever again (until you remove that folder).