That isn't it. I just talked to my friend about it and he said his computer is not an intel-based computer and this is the software that came with it. He has a G5. He also said he installed it on his wife's ibook, which is also not an intel-chip based computer.
Could it be that my hard drive is just messed up somehow, and that alert message came up because of some diagnostic test the system runs before installation that found a problem? I had some problems about a year ago or so where the computer would freeze and then it wouldn't want to restart. It would just keep making these grinding noises inside, like the hard drive was having some problem. But that hasn't happened in a long time, so I thought things were fine now. But maybe that's it. Maybe the hard drive just isn't right somehow and that's why it gave me that message.