Having a bootable USB is very essential, especially if you are a Netbook user. Using bootable USB to install an operating system (OS) not only makes the installation faster, but also saves a DVD.
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step by step
1. Insert your USB (Pen Drive) stick to the system.
2. Navigate to Start > All programs >Accessories > right click on Command Prompt and select run as administrator.
3. When the Command Prompt opens, enter the following command:
DISKPART and hit enter.
"wait for a while"
LIST DISK and hit enter.
Once you enter the LIST DISK command, it will show the disk number of your USB drive. In the below image my USB drive disk no is Disk 1.
4. In this step you need to enter all the below commands one by one and hit enter.
SELECT DISK 1
"Replace DISK 1 with your disk number"
CLEAN
CREATE PARTITION PRIMARY
SELECT PARTITION 1
ACTIVE
FORMAT FS=NTFS
"Format process may take few seconds"
ASSIGN
EXIT
Don’t close the command prompt as we need to execute one more command at the next step. Just minimize it.
5. Insert your Windows DVD in the optical drive and note down the drive letter of the optical drive and USB media. Here I use “G” as my optical (DVD) drive letter and “H” as my USB drive letter.
"or you can mount iso image"
6. Go back to command prompt and execute the following commands:
G: CD BOOT and hit enter.
BOOTSECT.EXE/NT60 H: and hit enter.
7. Copy Windows DVD contents to USB.
"copy either by xcopy or use GUI"
now boot through USB nd enjoyyyyyyyyyyy
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100% work
-----OK TESTED----- with window vista & win 7 -----
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