Too advanced grafic adapter driver
not sure what kind of video card you have got. but you should post that with this information to this topic in this link . for more better help with your video card problems .
https://forum-en.gw2archive.eu/forum/support/bugs/Lighting-Issues-Game-Update-4-18/page/3
good luck and hope your problem gets fixed and you can enjoy the game
no new system upgrades coming
Here’s a great site i always use which holds every nvidia driver ever released amongst amd drivers etc etc.So if you feel like you need to rollback,check the date of release + version and give it a go.
http://www.guru3d.com/files-categories/videocards-nvidia-geforce-vista-|-7.html