Some of the things were stuff that I had already tried. (sigh)I do appreciate your attention to detail.You might want to expand on the Hyper V stuff… It took me a couple of minutes to realize that my machine wasn’t using it. (yes, that is a nit! )Again, thanks for all the info.

I tried a 64GB USB 2 flash drive. No joy.formatted it, No Joy. Copied small file in, ejected drive, retried – no joy.did your scannow cmd (running as admin) – repeated.Ran the DISM stuff, repeated – did long reformat – repeated, no joy.Bought new USB 3.0 64GB flash drive.Repeated: rebuild attempt(no joy)/ formatted/retried- no joy. copied small file, deleted, retried – no joy.I’ve tried this with several different USB drive, verifying that I CAN read/write to them, doing quick format and full format.

Any other advice? Please?