ok....my laptop is out of warranty., but my problem is that I cannot redistribute partition space because seemingly the partitions are encrypted. Nothing that I have done, or was aware of - I read that this is done at manufacture time - so really it IS DELL's fault I managed to speak to technical support who stated there would be a charge of £48!!! - to undo Dell's own procedure. I was still half tempted as I need to increase the OS partition running short of space. What was their solution? a) new hard drive b) new laptop.......in their dreams. This is quite a high end Dell XPS 15 laptop - Dell are certainly less than helpful.