How to install Windows from USB flash drive


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How to install Windows from USB flash drive

This will show you how to create a USB flash key drive that you can boot from to install Windows with.
The USB key needs to be at least 4 GB in size.
Temporarily set the USB FDD (USB Flash Disk Drive) to be listed right before the hard drive (or partition) that you will be installing Windows on in the hard drive Boot Priority order list in the BIOS.

1. Download and install UltraIso

2. Plug in your USB key.

3. Right click on the UltraIso shortcut, and click on Run as administrator(if vista/win7)

4. Click on File (menu bar) and Open. (See screenshot below)


5. Navigate to your Windows ISO file and select it and click on the Open button. (See screenshot below)


6. In the bottom Local pane, select your USB flash key drive.

7. Click on Bootable (menu bar) and Wite Disk Image. (See screenshot above)


8. Make sure the locations are correct, and check the Verify box and click on the Write button. (See screenshot below)

9. Click on Yes to confirm writing to the USB drive. (See screenshot below)


10. When it's done, click on the Close button. (See screenshot below)


11. You now have a Windows installation USB flash key.


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Creating Bootable Vista / Windows 7 USB Flash Drive


* USB Flash Drive (4GB+)
* Microsoft OS Disk (Vista / Windows 7)
* A computer running Vista / Windows 7

Step 1: Format the Drive

The steps here are to use the command line to format the disk properly using the diskpart utility. [Be warned: this will erase everything on your drive. Be careful.]

1. Plug in your USB Flash Drive
2. Open a command prompt as administrator (Right click on Start > All Programs > Accessories > Command Prompt and select “Run as administrator”
3. Find the drive number of your USB Drive by typing the following into the Command Prompt window:
list disk
The number of your USB drive will listed. You’ll need this for the next step. I’ll assume that the USB flash drive is disk 1.
4. Format the drive by typing the next instructions into the same window. Replace the number “1” with the number of your disk below.
select disk 1
create partition primary
select partition 1
format fs=NTFS
When that is done you’ll have a formatted USB flash drive ready to be made bootable.

Step 2: Make the Drive Bootable

Next we’ll use the bootsect utility that comes on the Vista or Windows 7 disk to make the flash drive bootable. In the same command window that you were using in Step 1:

1. Insert your Windows Vista / 7 DVD into your drive.
2. Change directory to the DVD’s boot directory where bootsect lives:
cd d:\boot
3. Use bootsect to set the USB as a bootable NTFS drive prepared for a Vista/7 image. I’m assuming that your USB flash drive has been labeled disk G:\ by the computer:
bootsect /nt60 g:
4. You can now close the command prompt window, we’re done here.

Step 3: Copy the installation DVD to the USB drive

The easiest way is to use Windows explorer to copy all of the files on your DVD on to the formatted flash drive. After you’ve copied all of the files the disk you are ready to go.

Step 4: Set your BIOS to boot from USB

This is where you’re on your own since every computer is different. Most BIOS’s allow you to hit a key at boot and select a boot option.


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Microsoft's official Windows 7 USB/DVD Download Tool

System Requirements:

* Windows XP SP2, Windows Vista, or Windows 7 (32-bit or 64-bit)
* Pentium 233-megahertz (MHz) processor or faster (300 MHz is recommended)
* 50MB of free space on your hard drive
* DVD-R drive or 4GB removable USB flash drive

What to do if you don't have a DVD drive? You can create a bootable USB drive to install Windows 7.

Microsoft has released a new utility "Windows 7 USB/DVD Download Tool" which allows you to create a bootable USB drive to install Windows 7. It also allows you to create bootable DVD.

You can download it using following link: Microsoft Store: Download Manager Help

Direct Link

After downloading and installing the tool, when you launch it, it'll ask you to select the path where you have stored Windows 7 ISO file:

Provide the ISO file path and click on "Next" button. Now it'll ask you whether you want to create bootable USB drive or DVD:

Click on the desired button. If you select "USB Device", it'll ask you to insert the USB device. If your USB device is compatible, it'll be automatically detected by the tool:

Click on "Begin Copying" button. Now you'll be prompted to format the USB device. Accept the confirmation:

That's it. The tool will start copying the installation files to USB device:

At last, it'll show a message that "Bootable USB device created successfully".

src: AskVG