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?

Answer

Try this:

Start > Run

Type: diskpart

Execute: list disk

Execute: select disk # (# is the number of your USB)

Execute: clean

Execute: create partition primary

Execute: format recommended quick

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