Can you tell where the computer installs it to? Are you able to access regedit, and see where it references to? I don't have win8, so not much help, just know for sure that 486 is a registry error.
I upgraded to 8.1 as soon as possible as well, even having installed Classic Shell to get rid of the Metro user interface already with 8.0. I continue to use Classic Shell with opting to turn everything Metro off.
Windows 8.0 with its Metro User Interface... What a