Thanks for the reply whs
Well, I learned permissions prior to reading your post and hastily began deleting the files even though I fleeting thought it might be good to check boot record directors. As my luck goes, upon rebooting after deletion I was greeted with a stalled boot screen advising no boot record could be found. Why it would have associated or installed any boot files there is a mystery. No biggie though as I had not yet begun to install apps beyond the core OS, Win updates and drivers
Just completed a clean install with all other drives disabled. Simply for grins I went through the motions with MS imager and it performed as it should. That said, I still think I'll migrate to Macrium Std for purposes of flexibility. Two good things come from this -- I am now quite comfortable with permissioning and, the second install was even cleaner.
Thanks again for the helpful replies from all!