Since Windows 98, “general public” versions of Windows are sold on optical media, such are CD (98, Me, XP) or a DVD (Windows Vista and Windows 7). Windows 8 is no exception to the rule and will also be marketed as a DVD. If you have a laptop that has no optical drive, the Windows 8 installation disc is unusable. To install Windows 8 on your laptop without optical drive you will need to use a USB drive.
On computers that have a optical drive/CD/DVD burner, this operation also offers a significant advantage: a USB drive is faster than an optical disc. By installing Windows 8 from a USB stick you can save precious minutes while installing Windows. In my case, installation from a USB drive lasted about fifteen minutes, against thirty minutes from the original DVD. Finally, if the Windows 8 DVD damaged and become unusable, while this is not the case with the USB drive, which is much more reliable and durable.
So as you can notice the Windows 8 installation from a USB stick is a very interesting solution. Note that for this operation you will need to have a USB drive with at least 4 GB space.
Before proceeding to below steps make sure you download Windows 7 USB/DVD tool on your computer and install it.
Create the USB Installation
You must have a USB stick of at least 4 GB Note that all data on the USB key will be removed during the operation. Also note that if you want to make a USB install of Windows 8 from ISO 64-bit Windows 8, you must perform changes under 64-bit Windows.
Step 1: To get started go to your Start menu and lunch Windows 7 USB/DVD download tool
Step 2: When new window appears click Yes.
Step 3: In the window that appears, click the Browse button.
Step 4: Select the Windows 8 ISO file you downloaded and click Open.
Step 5: Click Next.
Step 6: Plug your USB stick (careful, its contents will be deleted) and click on USB Device.
Step 7: In the list that appears, select your USB drive and click Start copying.
Step 8: Click Clear USB device.
Step 9: Click Yes.
Step 10: The USB drive is then formatted and Windows 8 bootable and installation files are copied to your USB drive.
All you have to do now is restart your computer and start the Windows 8 installation from your USB drive.