Whether it's the official Windows 8 download links, officially slip-streamed Windows 7 SP1, or creating bootable rescue disks, .ISO disc image files are very handy to use specially for downloading full CD/DVD images from internet. Users had to depend upon third-party applications in previous version of Windows to mount or burn these disc images, but not anymore as Microsoft's upcoming Windows 8 operating-system comes with built-in support for mounting and burning .ISO and VHD files.