When you run any processor demanding application (e.g. Google Maps or even Windows Update), the cooling fun spins up (it is normal) but it is accompanied by a continuous and annoying crackling noise - it is NOT the noise of the fan, it is something different. It’s like the knocking sound of raindrops when they fall on the roof or a plastic tent.
There’s no crackling noise when you browse static web pages or read a static document for an extended period of time. However, starting any proessor demanding app the cooling fan will spin up and a few seconds later that crackling noise will also start.
The result is that videoconferencing (Skype) is virtually impossible because every participant constantly hears this loud crackling noise through the built-in microphone. The application you run is irrelevant, just be resource intensive enough that spins up the fan: like charting apps, video editing applications or playing a youtube video. Even running Windows Update gives enough load to start this annoying crackling noise - this makes the machine virtually unusable and I don’t know how to resolve it, please advise.