To prepare USB drive for Windows 10 installation, following two items are required which you can download from cross ponding links; 1- Rufus DOWNLOAD 2- ISO file of Windows 10 DOWNLOAD After that several further simple steps are involved to make any USB drive bootable valid for Windows 10 installation on any computer. Whereas capacity of USB drive should not be less than 8 GB. STEP-1 Plug in USB drive to functional computer/laptop. STEP-2 Run program of Rufus. STEP-3 If asked about checking the updates of Rufus then click on No button. STEP-4 In Rufus click on SELECT button. STEP-5 Import ISO file of Windows 10 by navigating to "Windows 10.ISO" by opening it. STEP-6 Now click the option below Partition Scheme. STEP-7 In drop down menu select by clicking MBR. STEP-8 Click on START button. STEP-9 In message box click OK button. STEP-10 In next message box click OK button too. STEP-11 Rufus starts working on USB drive. Wait for few minutes.