I have windows 7 and want to install ubuntu alongside it. I have a 1tb hard drive and when I go into disk management it says by c drive (I only have one drive) has 670gb of free space. I want to shrink 132gb for ubuntu but on the window where I choose how much I want to shrink it says "Size of available shrink space in MB: 30885" which is about 30gb. The there is a message at the bottom of the window that says "You cannot shrink a volume beyond the point where any unmovable files are located. See the "defrag" event in the Application log for detailed information about the operation when it was completed."
Does this mean I can only reserve at most 30gb for ubuntu even though I have 670gb of free space on my c drive, is there any way to fix this without reinstalling windows 7?