Fix your laptop's color and brightness with this hidden Windows app

For months, my Lenovo Yoga C940 laptop seemed to be playing tricks on me. One minute the display would be pleasantly bright, but switching to anything with a dark background caused a gradual drop in contrast, giving the screen an almost grimy appearance. I could even see the change kick in while switching between applications, as if some auto-brightness setting were constantly going awry, yet the Windows Settings menu offered no obvious solutions. Eventually, though, I found the source of the pr...