How To Format The Unformatable Pendrives ?

Problem:
I am unable to format my pendrive or delete some files in my pendrive.So how can i format my pendrive?

Why This Problem Occurs?
When your pendrive contains virus files it will constantly processing with your Pc.And eachvirus
are coded differently and its difficult to delete some infected files or format your pendrive.

Solution:

• Goto Start --> Run.
  
• Type Cmd & press Enter.
  
• Type the following

Format/x J:

• Here J: refers to your removable dsik drive letter.
  
• Press Enter.