Dear cdob, Still the bootable USB is not working . I did these steps: Using diskpart: Clean USB drive Create primary partition Format partition as FAT32 Set partition as active Copy DVD files or extract official ISO onto the drive Boot PC from USB and install I did all the above steps Open the command prompt Type: diskpart Type: list disk This will show all connected disks, their disk numbers, connection status and disk size Using the sizes, determine which disk is your USB drive and remember its disk number (i.e. Disk 2) Type the following commands: (where X is the disk number of your USB drive) sel dis X clean cre par pri active format fs=fat32 Quick Format exit + I made an image using daemon tools and copied the files into USB drive