Windows 8 has the ability to create a bootable USB Flash recovery drive that can be used to troubleshoot a Windows 8 computer that is unable to start. A recovery drive is the same as a start up repair disk, but instead of being on a CDDVD it is on a bootable USB drive. Once you boot up a Windows 8 computer with a Recovery Drive you will have access to a variety of diagnostic and troubleshooting utilities that can help resolves issues you may be having.