CPU and GPU spikes despite load

Jul 7, 2019
I have a beefy computer (RTX 2080, I7 9700k, 16 GB DDR4), yet every few hours both the CPU and GPU will spike and flat line for several seconds. Some times I am still able to hear, but the audio is choppy, and sometimes it is just a loud buzzing. Watching the task manager, only the CPU and GPU spike, memory and drives stay fine. I thought it might be a registry error, so I used CCleaner but it didn't help. I've run Norton deep scans and nothing popped up. The most confusing part is that it happens despite a light load, being the PC just sitting on the desktop. Also, most of the time that the lag occurs, Windows asks what device I plugged in, every time it being the mic. Any ideas?