How do I make sure my computer is fully updated?

I'm trying to check online for solutions and guides, but I don't know what to do or where to begin. I've ended up downloading something called an NVidia app onto my laptop, a GPU-Z, and gone to two different websites to see about updating. I don't know what the difference between a ROG Series update method and a ProArt Series update method. I've tried updating my graphics driver, but that ended up with me installing a GeForce Game Ready Driver, which now has a 'reinstall' option next to it so I don't know if it ever successfully installed. What do I do? How do I just make sure my laptop has been updated and isn't being swamped with 'add-on' programs?