diskpart

Run CMD.EXE as administrator
Type following commands and hit ENTER key after each command.

DISKPART                      - Starts DiskPart (duh)
LIST DISK                     - Shows numeral assigned to disks
                                Note the numeral assigned to drive you want to use
                                The numeral 2 will be used in this example
SELECT DISK 2                 - Does this really need an explanation?
DETAIL DISK                   - The info shown will confirm the correctness of your selection
CLEAN                         - The first/last 1MB of the disk/stick will be overwritten with zeroes
                                Alternatively, use "CLEAN ALL" to overwrite the entire drive (takes forever)
CREATE PARTITION PRIMARY      - Create a primary partition on the drive
FORMAT FS=NTFS (or FS=FAT32)  - Format the partition. Add "QUICK" to do a quick format.
ACTIVE                        - The partition can contain operating system startup files
ASSIGN                        - The next available letter is assigned to the drive
                                Alternatively you can manually assign one by adding "LETTER=X"
EXIT                          - Exit from the DISKPART program
EXIT                          - Exit from the command prompt