i need to customise a Windows os image,

my mum has bought my little sister a Microsoft surface pro for her birthday, she isn't comfturbel giving it to here as she fears for here safety. so she has asked me to add a parent motoring software to it, but she wants its so it will remain after a factory reset as she had this same problem when I was my little sisters age and I would just factory reset the device. I have tried doing this on my own by rolling a YouTube tutorial " [login to view URL] " but can't seem to get it to work. the program needs to remain with all settings setup and configuration after a factory reset is performed