Unable to boot into recovery disk

Hello, I had some problems with Ubuntu, and wanted to recover my Windows 8 MBR, so that I can boot back into it, and not a corrupted version of Grub2. Anyway, I burned an iso for the Windows 8 recovery disk, and the disk is fine since it works on another computer. However, it doesn't work on the computer I want to use it on. The recovery disk says Code: --------- Loading files... ---------...