Ok. Is there a better alternative Patrick?
I do use it alot, I alter the overclock and voltage depending on different games.
This may be a big reason you're also crashing. I would uninstall it as I said for troubleshooting purposes for now.
Driver Sweeper is 3rd party software used to delete current and/or entries of your nVidia or AMD drivers. I don't recommend using it unless it's absolutely necessary as the traditional method of uninstalling drivers and then reinstalling the latest is usually more than enough. The only time I generally recommend running software such as Driver Sweeper is when you're encountering a registry bug related to your video card drivers that can be solved with a quick clean by running Driver Sweeper.