Since my computer is running very well at the moment, I assume those defective files aren't too important. On another thread someone advised that a future update may fix them. In any case, if I have future problems I may opt to perform a reset of the machine. I've done that in the past and it always worked out well.
Since having an operating computer is very important, I recently purchased an RCA Viking tablet, running Android, although I'm much more familiar with Windows. I thank everyone for their assistance.