Was using TreeSize View to find out where some space was being used on a PC. There was a folder C:\System Recovery which I did not recognise as a Windows Recovery Partition.

Googling of this showed HP also use C:\System Recovery along with Alien Ware. 

Opening up dell backup and recovery show the last backup was 3 years ago however there was 150mb Files Every Week and any restore needed to purchase the software upgrade

So I uninstalled the Software which cleared this folder away and 40 GB of space