How to create a bootable USB flash drive in windows

C:\Windows\system32>diskpart

DISKPART> list disk

  Disk ###  Status         Size     Free     Dyn  Gpt 

  --------  -------------  -------  -------  ---  --- 

  Disk 0    Online          900 GB      0 B 

  Disk 1    Online         7836 MB      0 B   <- The 8 GB USB drive

DISKPART> select disk 1

Disk 1 is now the selected disk.

DISKPART> clean

DiskPart succeeded in cleaning the disk.

DISKPART> create partition primary

DiskPart succeeded in creating the specified partition.

DISKPART> format fs=fat32 quick

100 percent completed

DiskPart successfully formatted the volume.

DISKPART> active

DiskPart marked the current partition as active.

DISKPART> exit

Leaving DiskPart...

C:\Windows\system32>exit