Turned out to be a SecurityMaster AV issue. Ran the bleepingcomputer fixes, and was able to install McAfee. It did get hung up in the activation process, and I tried Prakash's fixes. I had no Sysprep folder, but installing only AntiSpam, then activating, then installing the rest of Total Protection took care of it. Thanks, Prakash!
Thanks for letting us know you got everything working. I will mark this as answered.