Thanks for getting back to me. There are two reasons why I want to make the change manually,
#1) It would be the only way for me to know for sure what is being changed. For example, a reg file will update the entire registry and I would have no idea what else could be changed from default.
#2) This way, I can write everything down and keep it in a safe place since I will need to make this change again in the future. Where as, if I back up a reg file, I could lose it if my external hard drive fails.
I was reading somewhere that by using the "reset this PC" option in Windows 10, will restore the entire registry back to defaults. Are you saying this is incorrect and the only way to restore the registry back to default is by formatting and re installing Windows 10? (Screen shot below.)