When I start up my PC for ther next 10 minutes or so the NUC is constantly accessing
and does not stop.
Is this a fault and how can I tell what it iks accessing.
Constantly accessing what? The hard drive?
So the Intel support engineers can have more information about your system, Download, run, and save the results of this utility as a text file:
Then ATTACH the text file using the instructions under the reply window ( Drag and drop here or browse files to attach ).
What have you done to clean up you hard drive?
Have you cleaned up your start up programs?
What anti-virus are you running?
Have you removed all PuPs?
This sounds more like a maintenance issue.