Can't install after recent reset

I recently had a to reset my pc back to factory because my son had downloaded a bunch of stuff that screwed my pc up. After reset Trend Micro will not install. It goes through the whole process likes it is installing but when it gets to 99% it says it cannot be installed. I. have removed any conflicting software that was already on there. Also when I first go to open the file to start the download it would say an error of some kind and I had to click keep anyway to even start the download. Not sure if that's relevant but I thought I would include that info just in case. I ended up having to do a trial of another software for the time being until I get this figured out so any help would be greatly appreciated.