Since yesterday, 1080p videos on Youtube started to lag when I play them, while using Chrome. When I degrade to 720p, they run fine. I tried the same on IE 11 and the videos run just fine on 1080p. Any idea what the problem might be? I have Intel i3-4000M 2.4 GHz, Nvidia Gefore 740M (1GB) and 6GB RAM. Also, I have the latest version of my video card drivers, Chrome and Flash Player. I hope that you can help me. Thanks and much appreciated.