Unknown Files Taking Up Hard Drive Space

[voodoochild16]

Hello all, I have a HP ProBook 4520s and the hard drive is 250GB's, and im constantly running out of space and I keep getting windows complaining that im running out etc.

I used two programs to help decipher what is taking up all this space, the screen shots are attached.

My specifications are:
Windows 7 Home Premium 32-bit
HP ProBook 4520s
Intel Core i3 CPU M 380 @ 2.53Ghz
2GB's RAM
(I tried using the "insert image" feature but the photos didnt show up).
http://postimage.org/image/dyul9utb9/
http://postimage.org/image/53nrzgsl3/
http://postimage.org/image/rmugu5tbl/
http://postimage.org/image/wxsvolmc3/17f678d9/
We at first thought of getting a newer hard drive that is bigger but we want to figure out what is truely taking up all this space. As you can see in the photos there is a image that shows the screenshot of "unscanned space" on my C drive. And in the Jdisk program the results show that 47GB's of space is taken up, but what is taking up the whole hard drive?. Oh and I also attached a screenshot of my actual hard drive, there is only 28.6GB's free in space. I have tried to compress and delete as much files as possible so far. Thanks in advance. for any tips or suggestions.