How to Make a USB Drive Bootable in Windows

WARNING:  This method will erase all content on the USB flash device!

Start DiskPart as administrator.

Disk part should now open and you’ll be at the command prompt.

List disk drives and select the UFD (USB Flash Device) such as your thumbdrive or a USB external HDD.

list disk
select disk 1

Clean the disk

clean

Create a partition and specify the partition size.  I usually use the entire disk space.

create partition primary

Select the partition we just created;  If you created only one partition, the default will be ‘1’.

select partition 1

Set the partition to active

active

Format the partition with NTFS filesystem (quick)

format fs=ntfs quick

Assign the newly created partition a drive letter.

assign

• Category: Windows