Sorry...haven't been on the forums for a while. Apologies.
Is there any other system you can try the mic out on?
Also, is there a different GPU you can swap out and run for a while to eliminate this possibility? I had my own issue with my MSI 5700XT a few weeks ago as it kept black-screening on me until it just eventually died and the Debug light for the GPU stayed brick red.
Also for a test set, perhaps try taking one of the two RAM sticks out and running it for various tasks on just one stick. If that one goes well, do the same with the other, remembering to keep the single stick in your MOBO's primary RAM slot. Otherwise, perhaps run MEMTEST to see if any errors are recorded. BSODs were driving me crazy in my older system at one point, and a rather scrutinizing MEMTEST set of runs revealed errors...unfortunately, Windows won't tell you which stick it is, thus the single stick method.
I'm kind of doubing your mic would be giving you fits...but these are PCs so...
I know this kind of troubleshooting is a PITA, but pretty much the only way to actually do process of elimination.
Good luck, and let us know if/when you find anything definitive.