I just bought an Acer Nitro 5 two years ago,and it was working fine. It was fast and gaming was awesome. But over time,the laptop's fan started making loud weird noises. I also noticed that the games are not running that well anymore. Everything lags,even tough I did a full factory reset,and reinstalled Windows. What could be the problem? I am sure it's not dust,because I always use my laptop only on my desk.