The fan on my surface Pro 4 is always on when im on the internet. In chrome, edge even. and especially if i watch a single youtube video. Overall the surface feels very slow and laggy. opening a new youtube video can take upto 20 seconds for the page to load, and its not the internet speed thats the problem. and closing tabs will take like 5 seconds before doing it. Also, in the beginning of youtube videos the sound plays just fine, but the screen lags and gets filled with hundreds of small black squares like the picture. Im wondering if its something i can fix, or mabye a defected unit. I really like the surface pro 4 and the consept. it just feels to slow and like a cheap computer more then what it should. And in class taking notes in OneNote i never get more than 3 hours out of the battery, seems a bit lower then the average in here. i dont know of thats also a defect. every driver and software is up to date. I hope someone can know what i can do to fix this, its driving me crazy.