This group is new to me, and not understanding it's purpose I replaced ownership of the Program Files x86 folder with the Administrator's group. This allowed me to delete the MSN folder I didn't want there. However, I quickly found out that once that group was removed as the owner, that was it - I could not put it back. There needs to be a way to restore the default owner on a folder. Don't let the admin/user actually mess with adding the TrustedInstaller to the directory, but at the very least, allow them to restore it if it was indeed the original entry.