I've already done a ton of googling to figure out why my RSAT won't install. Most people have an issue with their language not being English (United States) but that is not my problem because my default is already that. I upgraded from Windows 8.1 Pro to Windows 10 Pro so I wonder if that might be the problem but I have no idea. I've tried installing RSAT and restarting several times with no luck. Anyone else having this issue and have a fix for it?