Question PC random freezes and lags

May 6, 2020
I recently moved to a new room in my house, and added a new HDD to my pc, and all of a sudden I started getting micro freezes and random lag. And this is not only when I'm playing games, it even happens when nothing is running. I can notice the freezes even when moving my mouse, and they happen every 2 seconds or so. Also, I get these random lags, when my PC just freezes for a couple of seconds, but it isn't as frequent as the micro freezes, maybe every couple of minutes. I updated my drivers yesterday, and also cleaned my PC, before installing the HDD. My PC parts aren't exactly new, but it shouldn't be freezing my PC. Here are the specs:

Intel i7 870 CPU
AMD Radeon R9 280X GPU
MSI 2A9C Motherboard
4 sticks of 2 GB DDR3 RAM
1 TB Seagate HDD
2 TB Seagate HDD
Corsair 600 Watt PSU

Would also like to note that none of my temperatures are very high, and the CPU and GPU usages aren't very high either. My CPU only reaches around 75 Celsius during intense gameplay, and my GPU temps are even lower. If anyone needs any additional info, I'll be glad to provide it. Thanks for your help.