I am sorry for the inconvenience caused to you.
Please follow the below steps to disable the Show Add Photos screen
> Go to Lightroom > Preferences.
> Click on the General tab
> Uncheck “Show ‘Add Photos’ Screen”
> Restart Lightroom and check for the issue.
Also, please refer : Lightroom 6.2 Import Update
Thank you so much for getting back to me. I have done as you have shown, and so far this has shown a great change with my imports. I am finding that Lightroom gets worse as I import more and more, so I will try this, but this looks like it has really helped. My CPU did not spike.
So this now begs the following question: If lightroom is scanning my entire computer for suggestions for importing, how can I clear out any cache or logs lightroom has made of my directory?
Please update the Lightroom to 6.3
As the import window has been rolled back to the previous state.