When the videos that I download onto my g75 laptop are played, audio and video get distorted after a while. I'm viewing my videos on Windows Media Player. The audio is playing properly however I believe that the video is whats lagging behind. Please ...

My newly bought g75's fans usage isn't turning on. I downloaded an app where it tells me the Fan and the laptop temperature but it says the usage is 0%. Please help guys ! I'm a total noob with laptops/computers 