Hi Dave and Fernando,
I finally decided to call Microsoft Support, because the problem was more complex than I could handle. Paul assisted me in finding my lost personal files in C drive. He set up an F drive and congregated my personal files on that drive. I also was able to get the Windows software back. He also uninstalled over 20 programs that he said were messing up my computer, especially the MacAfee and Norton softwares, which he said were incompatible with Windows 10. I previously did not have problems with them until the last Windows update, 4 days ago.
Thank you very much for your assistance, Len