hi, changing usb port didn't help. tried all ports! used rufus, then tried win2flash, and then manually with bootsect / nt60 command to prepare the disk. file system on usb is ntfs. hard drive configuration in Bios is set to IDE... (tried others as well but no use). can anyone please help! don't suggest Microsoft download tool please ! any other work around is much appreciated as i need it very much. experts .. kindly dig into the problem