Ah, gotcha. Apologies.
Here is my system;
OS: Windows 10 Pro 64 bit
MOBO: Gigabyte X570 gaming X (BIOS version F4)
GPU: Radeon RX 5700
SSD: Samsung EVO 860 1TB (main boot drive)
SSD (M.2 1TB): Crucial MX500
CPU: Ryzen 5 3600
RAM: 4 x 8 GB DDR4 3600
In-terms of the stuttering, which more feels like a frame drop in reality. It usually happens either when I am playing games (most noticeably in League of Legends) and can be seen system wide. Like when I am on on Google, it will feel smooth than when I close a tab or click a link, you can visually see that it lags in some nature. It doesn't do this every-time I close a tab or click a link but it almost feels like it is periodically. Like 1 minute of smoothness than lag, than another minute, than lag again. Only for like a second or 2, and than resumes being smooth. Similarly to league of legends, when I playing, with FPS in the 120-140 range, it feels smooth but than after a minute or so, it feels like the frames drop to like 30. Though they do not.
I had an older system that had an Intel CPU and a NIVIDA GPU and noticed no lag at all when playing games or using the windows.
When I ran the WHySoSlow program, it did say something about my "Kernel Responsiveness", which I am not sure has anything to do with this mysterious lag or not.
I have reset my BIOS and reinstalled Windows but the problem still is there.