during this procedure you’ll lose any data on your USB flash drive so please be careful during formatting, choosing the wrong drive will erase it completely.
Preparing the USB drive and make bootable:
1. Insert your USB flash drive to your running computer. As the first step, we need to run Command Prompt as administrator. Open command prompt as administrator – Click on Start > All Programs > Accessories > Command Prompt or type cmd in the Start search bar.
2. Type ‘diskpart‘ on Command Prompt (without quotes) and pressing Enter. Wait for a while until the DISKPART program run.
3. Type ‘list disk’ to view active disks on your computer and press Enter. There would be seen that the active disks shown as Disk 0 for hard drive and Disk 1 for your USB flashdrive with its total capacity.
4. Type ‘select disk 1’ to determine that disk 1 would be processed in the next step then press Enter.
5. Type ‘clean’ and press Enter to remove all of data in the drive.
6. Type ‘create partition primary’ and press Enter. Creating a primary partition and further recognized by Windows as ‘partition 1’.
7. Type ‘select partition 1’ an press Enter. Choosing the ‘partition 1’ for setting up it as an active partition.
8. Type ‘active’ and hit Enter. Activating current partition.
9. Type ‘format fs=ntfs quick’ and press Enter. Formatting current partition as NTFS file system quickly. you can use command format fs=NTFS but it take more time to formatting.
10. Type ‘exit’ and press Enter. Leaving DISKPART program but don’t close the Command Prompt instead. We would still need it for next process.
Process to making Windows Installation drive
Now Insert Windows 7, 32/64-bit installation disk into DVD drive
Now copy all files and folder of Windows 7 from DVD (If you have already saved in Hard disk then you can copy from there) to USB root folder (etc. don’t put it into any folder)
You are now ready to install Windows 7 from USB flash drive!