Few days back Microsoft released its much hyped product Windows 8. You can install this for free and you can do this in two ways. You can either use a installer or you candownload the ISO file. Unless you have a insanely high speed internet connection, your computer will literally choke during installation. So using a iso file is the best option available, by which you are supposed download the iso file and burn it to a DVD and boot from it. But why waste a DVD when you use any old >=4GB usb drive for it. There are lot of programs to do this but i’ll teach you how to do this easily without using any of them. With this tutorial you can install any OS on your PC using a USB pen drive.

> Download and install WinRAR from web. Extract the .iso file you’ve downloaded using this. Press Win+R, type cmd and press Ctrl+Shift+Enter.

> Copy Paste diskpart and hit enter. Later copy paste list volume and hit enter. Now observe the volume number of your USB drive, for the sake of tutorial lets say its 5. Also note down drive letter lets say its D.

> Now copy paste select volume 5 and hit enter. Copy paste active and enter. Again copy paste exit and enter. We’re almost Done.

> Right click on extracted iso folder, select properties and copy paste the folder location form there to command window. Press enter, copy paste cd boot and enter. And as final touch copy paste bootsect /nt60 d: where d is the drive letter of the usb it told you note down in 2nd step.

All done, you have made your usb pen drive bootable. All you have to do is copy the extracted folder contents to this usb and restart your PC and It’ll boot from the usb.
If it doesn’t use bad words for me and reboot the system and enter the BIOS mode(for this you have read the message at bottom of screen while pc starts). Change the boot priority to assign highest priority to Removable Device/USB Device. Save changes and restart again.Just in case if it asks for a key use NF32V-Q9P3W-7DR7Y-JGWRW-JFCK8.