Windows 7 – Re-format thumb drive

I was trying to put the Windows 8 Consumer Preview onto a thumb drive, when I was asked if I was OK with wiping it (I said yes I as it was blank).

I had to sleep my computer during the wiping, and now I can’t do anything with my dive.

When I put it into my computer:

Asked to reformat

When I click format disk:

Unknown capacity

In short, the disk never reformats (I get an error message letting me know that Windows was unable to format the drive).  Whats going on, and how do I fix it?

Solution:

Try this:

  1. Start > Run
  2. Type: diskpart
  3. Execute: list disk
  4. Execute: select disk # (# is the number of your USB)
  5. Execute: clean
  6. Execute: create partition primary
  7. Execute: format recommended quick