The reason i ask is that lately, i have noticed a decrease in performance, i ran error checking and that went on for quite a while. I have had alot of game crashes due to memory (probably RAM). I even got a random blue screen out of nowhere. But the main thing is that When i start up my computer or using my hard drive quite a bit, it makes a REALLY loud noise. sort of grinding but mixed with alot of vibration. so i looked up the noise and it is apparently in critical condition, But when i open windows Disk management it sais the HDD is healthy. so i don't know what to believe and would like an explanation, thank you.