Why This Problem Occurs?
When your pendrive contains virus files it will constantly processing withÂ your Pc.Â And each virus are coded differently and its difficult to delete some infected files or formatÂ your pendrive.
- Goto Start –> Run.
- Type Cmd & press Enter.
- Type the following
Â Â Â Â Â Â Â Â Â Â Format/x J:
- Here J: refers to your removable dsik drive letter.
- Press Enter.
That’s it your unformattable pendrive problem is fixed.