Unfortunately, I didn’t see this tread so I created a new yesterday about the same topic (with screenshots):
As a summary, same issue as the OP, I saw that lsass.exe and nllToolsSvc.exe create a spike on my C Drive whenever this happens and the most possible culprit is nllToolsSvc.exe and thus Norton.
I also posted both our threads to the v24.xx issues thread for a bit more visibility, as it seems it makes it easier to pass down issue reports: