I really appreciate All of the help here! I'll give these things a try and hopefully the issue will go away and I can save some of whats left of my sanity...  Regardless of results, I will post back.
 
Thanks again to everyone!
 
Kind regards,
Rick 

The 'Brute Force' approach worked.
 
I moved the library, at the desk, to the same drive letter as the laptop sample drive, opened the .nki file and re-saved it, saved the project, and now the issue is gone.
 
At this point I will never really know what the root cause was, but the curiosity that was driving my desire to know was killing my cat... 
 
Thanks again for every ones help. I am now working without interruption.
 
Kind regards,
Rick