|Making an USB flash disk bootable and installing Windows from it is easy. Just follow the guidelines below:|
HOW TO MAKE A USB FLASH DISK BOOTABLE WITH OS INSTALL FILES
Note: You need a PC with Windows Vista or Windows 7 installed to create a bootable USB flash disk because the commands you will need come built-in with these OSes only. You also need Windows 7 or Vista DVD disk to copy the installation files from.
1. Insert your USB (4GB+ preferable) stick to the system and backup all the data from the USB as you are going to format the USB to make it as bootable.
2. Open elevated Command Prompt (with Admin Rights).
3. When the Command Prompt opens, enter the following commands and press <enter>:
DISKPART <enter> ( diskpart program starts running ).
LIST DISK <enter>.
Once you enter the LIST DISK command, it will show the disk number of your USB drive (stick). Let's assume it is DISK 1.
4. In this step you need to enter all the below commands one by one and hit enter. As these commands are self explanatory, you can easily guess what these commands do.
SELECT DISK 1 (Replace DISK 1 with your disk number) <enter>.
CREATE PARTITION PRIMARY <enter>.
SELECT PARTITION 1 <enter>.
FORMAT FS=NTFS <enter>.
Don’t close the command prompt as you will need to execute one more command at the next step. Just minimize it.
5. Insert your Windows 7 DVD in the optical drive and note down the drive letter of the optical drive and USB media. Here we use “D” as the optical (DVD) drive letter and “H” as the USB drive letter.
6. Go back to command prompt and execute the following commands:
D: (Replace D: with the drive letter of your DVD drive) <enter>.
CD D:\BOOT <enter> ( where “D” is your DVD drive letter ).
BOOTSECT.EXE /NT60 H: <enter> (where “H” is your USB drive letter)
7. Copy Windows 7 DVD contents to USB stick.
Now you can insert the bootable USB stick and restart your PC. You may need to make the removable disk as the first boot item in BIOS.