windows 10 installation step by step 1. plug windows 10 bootable USB device 2. Start laptop/desktop PC 3. press F12 Function key (for dell,lenovo ,toshiba PC) 4. boot Device Menu a. Select USB Device and press Enrer key 5. press any key to boot from USB... press Enter key 6. Click next 7. Click install now 8. Click I accept the license terms check box and Click Next 9.Click Custom: Install Windows only (Advanced) 10. Drive 0 partition 2 ?GB