Thank you. That was very informative....and I can confirm I created no scripts.
Curiously enough, two days ago Windows 10 would not boot, saying there was a missing file. But even booting up my Macrium USB stick and accessing the DOS like environment (sorry, having a senior moment) I ran SFC and it returned negative. Another curious thing is my most recent 2 C drive backups were corrupt, something I've never experienced before since using Macrium for years now.
So I ended up just installing Windows from scratch. Since I had no reliable backups I've been working through installing the many programs I use for music, etc., and so far no more messages. However I'm now getting evidence of possible corruption on yet another HDD though I've yet to pin it down since I just stumbled on it a few minutes ago. (I have all SATA data slots filled and an add-in board with 4 more SATA ports for 30+ TB)
For now I'm golden and although I want to understand the root of the problem, I'm so worn down with these recent problems I just want to forget about them for a bit.
I thank you for your help and very informative replies, and should the problem reappear I will attempt to set proper rules to point the way to the guilty parties.