I checked it with CrystalDiskInfo and it looked fine, though. I'll try to get my hands on a new HDD.
The buzzing noise is the sound coming from my speakers. It's the sound that was playing before the computer crashed repeating itself really quickly.The "loud Buzzing Noise" could come from any fan in the machine. It's possible that it's the CPU fan malfunctioning and thereby causing the machine to overheat. There's several free H/W monitors out there that allow you to monitor the fans and core temps. Even though I can't for the life of me think of a name of any right now. You can google it though. Try one of those to see if it'll show any issues.
Open the case and look. Just about any ram chip has a sticker with the speed, mfg, required vdimm, etc.I got it prebuilt, I don't know the RAM's exact specs. I'll try to do that, though.