Format on Windows 7 [1]

From dos window:

DISKPART
LIST DISK
SELECT DISK # (USB Stick)
CLEAN ALL
CREATE PARTITION PRIMARY
SELECT PARTITION 1
ACTIVE
FORMAT FS=FAT32
ASSIGN
EXIT
EXIT


[1] http://www.sevenforums.com/hardware-devices/61770-cannot-format-usb-flash-drive.html