Expanding Windows Paritions

Expanding Windows Paritions

I'm in the process of removing an ubuntu partition from my laptop in
favour of booting it from within windows - as I'd rather reclaim the space
and only use ubuntu where necessary.
I've fixed the boot sequence so I don't have to worry about GRUB issues,
now I'm onto fixing the space allocation, and I've run into two issues.
Firstly, I can't expand the C partition to include the former ubuntu
partition (labelled V in this case). If I delete what is there the expand
C option is greyed out, and trying to delete the partition entirely brings
up an error about lack of memory free space.
Secondly, I'm trying to figure out what the random 3.85 GB on the end is
for. I can see the recovery section on the far left, so why is there 3.85
GB chilling by itself?
I've added a screenshot to help illustrate my point /

Also note one of the sections in the top list refers to a repair disc that
was in at the time of the screenshot.