I optimized the system. Since then, I ran SFC half a dozen times to ensure that I didn't introduce any issues. It found and fixed errors a couple of times. I ran the DSIM health check, and it found nothing. I just don't want to run SFC manually when I can automate it and maybe stay ahead of things. I'd actually automate the DSIM health check and fixes if I could.
I sourced refreshes using links and instructions from this guy
https://answers.microsoft.com/en-us/profile/f809b40e-6005-48ef-981e-0280ae3f1c38. The system has been fine since then for some time now.
I am on 21H2, 11/21/21, build 19044.1645, Windows Feature Experience Pack 120.2212.4170.0.
I locked it at 21H2 in group policies to avoid nuisances as I know MSFT likes to sneak in updates to your current system that are really attempts at transitioning you to their next OS. That's what they did with Windows 10 when it first came out. I never move to the next OS until it has been through three major update cycles.
So, do you know how to autorun things like SFC and DSIM?