Well today I was getting pissed because my CPU was idle at like 60% and above, so I start to organize my hard drive.
Well I want online and used trusty old google and I got a site where it told me to go to administrative tools and to services. I did that but then saw Computer management, clicked that, and I Found out that 100 GB's of my hard drive was Unallocated, so Now I'm happily formating that section of my hard drive.
Just thought It would help others who have got a HDD and have a big part of it missing.
Heres the screen shot: