PC making weird noise

Solution
That's just normal hard drive noise. Some hard drives are simply noisy. Some cases also make great resonance chambers to amplify hard drive noise.

Try using rubber screw mounts to reduce vibration.
https://www.amazon.com/Lamptron-HDD-Rubber-Screws-Blue/dp/B003U3TTS8/
That's just normal hard drive noise. Some hard drives are simply noisy. Some cases also make great resonance chambers to amplify hard drive noise.

Try using rubber screw mounts to reduce vibration.
https://www.amazon.com/Lamptron-HDD-Rubber-Screws-Blue/dp/B003U3TTS8/
 
Solution
I agree.. that's just the hard drive reading/writing. Some hard drives are louder than others, and nothing to be concerned about. I personally like the sound. If I'm wondering if my system is tied up reading something, I don't have to look at the HDD activity light on the tower, I can hear it :)