I had 3 Gb which I could not empty or delete , after exhausting all methods suggested on the internet and on this
site ( I reformated one drive ) I did some lateral thinking , firstly I slected properties on the Nprotect folder and made it accessible to
"Everyone " ( I am not sure if this is absolutely necessary ) and booted to a Cd running Knoppix ( a free Linux download ) which mounts a
virtual disk with a number of useful programmes including a file browser , using this explorer I navigated to the NProtect folder on my hard
drive selected all contents and deleted . Much to my relief this worked without hitch .
I hope that this may help others as I wasted much time trying to achieve this result .