U2414H, GTX 1050 Ti, AMD Ryzen 5, VLC/Media player issue

Hi All,

Was working fantastically, and then bizarrely out of the blue I had some sort of Nvidia error. Anyway, since this, when I edit video in Adobe Premiere everything looks great. When I watch videos outside of premiere, the image is extremely dark and over saturated. I have troubleshooted the video files which play fine on other laptops/iPad etc. I have went into the Nvidia control panel and had a look about for anything amiss, and reset all the defaults, likewise with color collaboration on Windows 7. 

Anyone come across this? Debating whether it is a software/driver problem or something wrong with the monitor. However because it has correct color etc in Premiere, I'm guessing it rules out the hardware. Any ideas?

Many thanks in advance