Create installation media for Windows 8.1.
FromMicrosoft:Create installation media for Windows 8.1 using either a USB flash drive or a DVD. Download (1.41MB)
Prepare USB drive to be a bootable replacement for the Windows optical drive.
Format volume to FAT32.
Install Windows/WinPE onto a USB drive and boot from it.
Restore files from USB flash drive.
Recover files from formatted hard drive, formatted card, formatted USB drives.
Defrag your hard disks and optimize the PC.