How to make a pen drive bootable and load OS from it:

Generally to load an operating system into an hard disk we use a bootable CD/DVD. But sometimes a situation may arise where booting with a CD is not possible.In that case we can use a pendrive to make it bootable and load OS from it.

To make a pendrive bootable open command prompt (With Administrator Rights) and follw the below commands:

>>Type DISKPART in command prompt:

Microsoft Windows [Version 6.1.7600]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.

C:\Windows\system32>diskpart

Microsoft DiskPart version 6.1.7600
Copyright (C) 1999-2008 Microsoft Corporation.
On computer: GURUNATH-PC

>>Type LIST DISK

DISKPART> list disk

Disk ### Status Size Free Dyn Gpt
-------- ------------- ------- ------- --- ---
Disk 0 Online 465 GB 0 B
Disk 1 Online 14 GB 0 B

>>This will show all the disks attached to your system.Now select disk in which your pendrive is attached. In my case it disk 1

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> select partion 1

Microsoft DiskPart version 6.1.7600

DISK - Shift the focus to a disk. For example, SELECT DISK.
PARTITION - Shift the focus to a partition. For example, SELECT PARTITION.
VOLUME - Shift the focus to a volume. For example, SELECT VOLUME.
VDISK - Shift the focus to a virtual disk. For example, SELECT VDISK.

DISKPART> select partition 1

Partition 1 is now the selected partition.

DISKPART> active

DiskPart marked the current partition as active.

DISKPART> format fs=ntfs quick

100 percent completed

DiskPart successfully formatted the volume.

DISKPART> assign

DiskPart successfully assigned the drive letter or mount point.

DISKPART> exit

Leaving DiskPart...

>>Now navigate to the directory where your os is located and naviagte to Boot directory. In mycase in my H: direcotry i have my os.

C:\Windows\system32>h:

H:\>cd boot

H:\BOOT>bootsect.exe/nt60 g:
Target volumes will be updated with BOOTMGR compatible bootcode.

>>Here g: is the label of your pendrive.

G: (\\?\Volume{25f0b204-570b-11e2-bacb-001e101f7f74})

Successfully updated NTFS filesystem bootcode.

Bootcode was successfully updated on all targeted volumes.

H:\BOOT>

Now you have successfully created a bootable pendrive and now we ready ready to load os from that drive.