“Most files leftover after uninstalling programs don’t matter. They take up little space and don’t really slow down your computer. Cleaners and uninstallers can even sometimes do more harm than good. Unless you’re fixing a specific problem, don’t worry about it. If things get messy, reinstalling Windows is the ultimate reset.”
Go to (83) Do You Really Need a “Clean” Uninstall? (Probably Not) – YouTube for the description.