Thanks for your reply.
Error message appears after the first 7 images have been imported. I've never changed any import setting so presume they are as standard default.
The 130 images on the card where taken over a period of 10 days. The 7 images that are being imported were all taken on the same date (27/09) and the rest of the images were on subsequent dates over the next 10 days don't know if this has something to do with it.
Hope you can help, this is driving me mad!!
Are you absolutely certain you're opening Lightroom 5.7.1 and not an earlier version of Lightroom still on your machine?
It seems that Lightroom is unable to read the files from your card due to permissions.
Would suggest you to copy the images from your card to your drive first through file explorer and then, import in Lightroom to see if it works.