Hi
It looks like you have a 200 gig hard drive partitioned into 3 drives.
The size of the C:\ drive is far too small.
I'm guessing that the drive is almost full with just Windows 7 installed
You can go through all the work of re-partitioning it, or as Sarge says just buy a 500 Gig drive and either start over and re-install or transfer your old drive to it.
Unless you have an external drive it is probably easier to just back up you data on DVDs and start over.
Mike