Hey everyone. Recently (August 2019) I built a new PC with a Ryzen 5 3600X, an RTX 2070, and 16GB of RAM. The thermals are perfectly fine, it doesn't have any malware, and I've cleaned a lot of junk off. I make sure to keep it clean, and there is no problem with dust buildup. The past couple weeks, I've noticed a serious slowdown, and have even crashed while playing some games. I have two suspicions: the hard drive and the power supply. The hard drive originally came with a pre-built PC I purchased back in April 2016, and I've also heard some strange clicking sounds, but I dismissed it as not being of concern because my files aren't corrupted, most of my programs and the OS are on a new SSD, and in the disk manager it claims the hard drive is "healthy." It could be a problem with age but I don't see how under 4 years of use would kill a hard drive. The second one is the power supply, simply because when I shut down the PC completely, but don't turn off the power supply directly, it makes a faint buzzing noise. Most sources I've checked have claimed that this is called coil whine and it's normal. Any help is truly appreciated, thank you.